EnglishCBSE Class 8 · Chapter 15

Bibha Chowdhuri Class 8: The Beam of Light for Women in Indian Science

Updated 15 October 2026 · Fact-checked

This Poorvi Unit 5 lesson tells the story of Bibha Chowdhuri, described as India's first woman physicist. Born in Kolkata in 1913, she researched cosmic rays and subatomic particles, was nominated for a Nobel Prize, yet stayed largely unknown. In 2019 a star was named 'Bibha' after her, and today's women scientists build on her path.

What Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science is about

The lesson on Bibha Chowdhuri, a pioneering physicist whose name means 'beam of light', is the last lesson of Unit 5 (Science and Curiosity) in Poorvi, the Class 8 English textbook. It is a biographical, informative text.

It describes Bibha Chowdhuri (born 1913, Kolkata), called India's first woman physicist, who worked at the Bose Institute, studied cosmic rays at the University of Manchester under Nobel Laureate Patrick M.S. Blackett, was nominated for the Nobel Prize in 1950 by Erwin Schrödinger, and became the first woman faculty member at TIFR, chosen by Homi J. Bhabha. She received no awards in her lifetime and died in 1991, largely forgotten. In 2019 the International Astronomical Union named the star HD 86081 in the constellation Leo 'Bibha' ('beam of light'). The lesson links her legacy to women in ISRO today, such as Dr Ritu Karidhal Srivastava, the 'Rocket Woman of India'.

Key ideas: persistence against prejudice, recognition of unsung heroes, and women in STEM.

CBSE sets no Class 8 paper; your school sets the exam. Expect sequencing, extract questions, fact or opinion, short and long answers on her struggles and legacy, grammar (antonyms, suffixes -ship/-ment/-hood, acronyms and clipping, active and passive voice) and a report on a science exhibition.

Weightage: CBSE sets no Class 8 English paper or marks: Class 8 is assessed by your school, which teaches from NCERT Poorvi. School papers usually mix extract questions, short answers (about 40-50 words) and longer answers (about 100-150 words), plus grammar and writing from the "Let us learn" and "Let us write" sections.Source: docs/research/cbse-8-2026-27.md (NCERT book list, Reprint 2026-27)

Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science: summary

In our own words, in the order of the text. Read the NCERT text itself too: the board quotes from it.

A trailblazer. Today, women behind ISRO's Mars Orbiter Mission and Chandrayaan-3 are celebrated, but the foundation was laid by pioneers like Bibha Chowdhuri, whom the lesson calls India's first woman physicist. At a time when Indian women struggled to get education, she rose against social expectations in a field dominated by famous men, though her own name was known to only a few.

Early work. Born in Kolkata in 1913, Bibha's persistence earned her a place at the Bose Institute. She went on to become the first Indian woman to do outstanding work in high-energy particle physics.

Breaking boundaries. In 1945 she went to the University of Manchester, where she researched cosmic rays under the Nobel Laureate Patrick M.S. Blackett. Her Ph.D. thesis drew local attention, and a newspaper introduced her as 'India's New Woman Scientist' with 'an eye for Cosmic Rays', a title that showed both admiration and how unusual a woman scientist seemed. Though close to greatness, she stayed in the shadow of male colleagues. The lesson names her most notable contribution as the discovery of pi-mesons, a subatomic particle. In 1950 Erwin Schrödinger nominated her for a Nobel Prize; it was unsuccessful, but it showed her talent. She never received an award in her lifetime, yet kept working.

Back in India. In 1949, back home, she joined the Tata Institute of Fundamental Research (TIFR) as its first woman faculty member; Homi J. Bhabha chose her himself. She later worked at the Physical Research Laboratory in Ahmedabad, under Vikram Sarabhai's mentorship, and the Saha Institute of Nuclear Physics in Kolkata, and carried out research as far as the Kolar Gold Mines. Her work went on quietly, on the edges of public praise. She died in 1991, her story untold.

Legacy. In 2019 the International Astronomical Union gave the star HD 86081, in Leo, the new name 'Bibha', which means 'beam of light'. In 2020 the Government of India created a chair professorship in her name. Today women in ISRO lead major missions: Dr Ritu Karidhal Srivastava, the 'Rocket Woman of India', played a key role in the Mars Orbiter Mission and led work on Chandrayaan-2 and Chandrayaan-3, to which over 50 women contributed.

From shadows to the stars. The journey has been long and hard, and there is still far to go, but every achievement, from the Moon to Mars, shows it is worthwhile. Bibha's story continues to inspire young women to follow their passions and break barriers.

Themes and message

Persistence against odds

Bibha faced a society that limited women's education and a field dominated by men, yet she kept working without awards or fame.

From the text: 'Chowdhuri never received any awards during her lifetime, but continued her work tirelessly.'

Recognition of unsung heroes

Her name was nearly forgotten; the star named after her in 2019 and the 2020 chair professorship correct that neglect.

From the text: 'The stars are not meant to remain hidden forever.'

Women in STEM

The lesson traces a line from Bibha to women leading ISRO missions today, showing progress built on earlier pioneers.

From the text: 'their success is built upon the shoulders of pioneers like Bibha Chowdhuri'

Light as a symbol

Her name means 'beam of light'; she lit the way for others and now shines as a star.

From the text: 'Bibha Chowdhuri emerged as a rare beam of light'

Characters

Bibha Chowdhuri

Physicist and pioneer for women in Indian science (1913-1991).

Brilliant: cosmic-ray research, Nobel nomination
Persistent and determined
Humble: worked without seeking awards
A trailblazer for women

'a woman who defied the odds and lit a path for others to follow'

Mentors and colleagues

Scientists linked with her career.

Patrick M.S. Blackett: Nobel Laureate, her guide at Manchester
Erwin Schrödinger: nominated her for the Nobel Prize (1950)
Homi J. Bhabha: chose her for TIFR
Vikram Sarabhai: mentor at the Physical Research Laboratory

'personally selected by Homi J. Bhabha'

Dr Ritu Karidhal Srivastava

ISRO scientist; the 'Rocket Woman of India'.

Key role in the Mars Orbiter Mission
Leadership in Chandrayaan-2 and Chandrayaan-3

'popularly referred to as the ‘Rocket Woman of India.’'

How it is written

Device	Example	Effect
Extended metaphor of light	'a rare beam of light'; 'lit a path'; 'a star in heaven'; 'beacon'	Links her name's meaning to her role as a guide and inspiration.
Contrast	Famous male scientists 'whose names the world would come to celebrate' vs hers 'whispered only'	Highlights the injustice of her being overlooked.
Headings	'Breaking Boundaries'; 'From Shadows to the Stars'	Organise the text and sum up each stage of her story.
Facts and dates	1913, 1945, 1949, 1950, 1991, 2019, 2020	Give the biography credibility and a clear timeline.

Key quotations

Short lines worth knowing by heart: who says them, when, and why they matter.

a woman who defied the odds and lit a path for others to follow
Writer: Introducing Bibha.
Sums up her role as a pioneer.
She has an eye for Cosmic Rays
Newspaper headline (quoted): After her Ph.D. thesis at Manchester.
Shows public admiration and surprise.
Chowdhuri never received any awards during her lifetime, but continued her work tirelessly.
Writer: On her career.
Persistence without recognition.
The stars are not meant to remain hidden forever.
Writer: Before describing the star named after her.
Recognition finally comes; double meaning of 'stars'.
their success is built upon the shoulders of pioneers like Bibha Chowdhuri
Writer: On women in Chandrayaan-3.
Today's achievements rest on earlier struggles.

Key concepts

Timeline of Bibha Chowdhuri's life

1913: born in Kolkata.
Bose Institute: first Indian woman to excel in high-energy particle physics.
1945: University of Manchester, cosmic rays, under Patrick M.S. Blackett; Ph.D.
1949: returns; first woman faculty member at TIFR (chosen by Homi J. Bhabha).
1950: nominated for the Nobel Prize by Erwin Schrödinger.
Later: Physical Research Laboratory (Ahmedabad, with Vikram Sarabhai), Saha Institute of Nuclear Physics (Kolkata), research at Kolar Gold Mines.
1991: dies, largely forgotten.
2019: IAU names star HD 86081 in Leo 'Bibha'.
2020: Government of India chair professorship in her name.

Worked example

Which came first: her TIFR appointment or her Nobel nomination?

Try it first, then show the solutionSolution

TIFR: 1949.
Nobel nomination: 1950.

Answer: Her TIFR appointment (1949) came a year before the Nobel nomination (1950).

Word building: antonyms, suffixes, acronyms, clipping

Antonyms from the text: core x periphery; dependent x autonomous; extinguish x ignite; terrestrial x celestial; effortless x arduous; trivial x notable; neglect x acclaim; weakness x tenacity.

Suffixes: -ship (membership, partnership, citizenship, leadership, mentorship), -ment (government, entertainment, agreement, achievement), -hood (childhood, brotherhood).

Acronyms (read as words): ISRO, STEM, NASA, AIIMS, AYUSH, NIPER, WHO.

Clipping: back clipping keeps the front (exam, ad, gym, photo, memo, lab); front clipping keeps the end (phone, net, bike); middle clipping keeps the middle (flu, fridge).

Worked example

Classify the clippings: (i) fridge (ii) phone (iii) gym

Try it first, then show the solutionSolution

fridge from refrigerator: middle kept.
phone from telephone: end kept; gym from gymnasium: front kept.

Answer: (i) middle clipping (ii) front clipping (iii) back clipping

Active and passive voice

Active: the subject does the action: 'Schrödinger nominated Bibha.'
Passive: the subject receives the action: 'Bibha was nominated by Schrödinger.' Form: be + past participle (is/are/was/were/has been + V3).

Use the passive when: the action matters more than the doer ('A cure was discovered'); the doer is obvious ('The anthem is sung'); the doer is unknown ('The car was stolen'). Reports and science writing often use it.

Changing voice: object becomes subject; use the right form of 'be' in the same tense; add 'by + doer' only if needed.

Worked example

Change to passive: 'The IAU renamed a star in 2019.'

Try it first, then show the solutionSolution

Object 'a star' becomes subject.
Past tense: was + renamed.
Add 'by the IAU'.

Answer: A star was renamed by the IAU in 2019.

Report writing (school magazine)

Format: headline; reporter's name (and class or role); three paragraphs.
Language: past tense, passive voice, third person; formal and factual.
Content: (1) what, who organised or hosted, when, where, why; (2) participants, chief guest, competitions and model topics; (3) winners, chief guest's and visitors' remarks, conclusion.

Worked example

Write a report (about 150 words) on an Inter-house Science Quiz held in your school.

Try it first, then show the solutionSolution

Headline, byline.
Para 1: 4Ws + why; Para 2: events, topics; Para 3: winners, remarks.

Answer: Bright Sparks at the Inter-house Science Quiz / by Sana Qureshi, Student Editor / / An Inter-house Science Quiz was organised by the Science Club on 18 November 20XX, from 10 a.m. to 1 p.m., in the school auditorium. It was held to encourage curiosity and quick thinking. Teams from all four houses took part. / / The quiz was inaugurated by the Principal. Six rounds were conducted, including a rapid-fire round, an audio-visual round on India's space missions and a round on women scientists such as Bibha Chowdhuri. The scores were tied after five rounds, so a tie-breaker question was asked. / / The trophy was won by Raman House. In her closing remarks, the Principal praised the teams for their teamwork and urged every student, especially girls, to explore careers in science. The event was enjoyed by the whole audience.

Fact or opinion, and panel discussion

Fact: can be checked (dates, events): 'In 1949 she joined TIFR.' Opinion: a judgement: 'She was the beacon whose story inspires young women' (a view, though widely shared).

Panel discussion roles (topic: mobile phones, beneficial or harmful): moderator (introduces, invites speakers, sums up, thanks); principal (concerned about discipline); teacher (partly in favour, educational use with limits); parent (worried about health and social effects); student (in favour: connectivity and learning). Speak politely, take turns and support views with reasons.

Worked example

Fact or opinion: (i) The star HD 86081 is in the constellation Leo. (ii) Bibha deserved the Nobel Prize.

Try it first, then show the solutionSolution

(i) Can be checked.
(ii) A judgement.

Answer: (i) fact (ii) opinion

Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science in real life

Each concept, met in an everyday situation. Read the situation, answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Breaking stereotypes

Suppose a relative tells your cousin that physics is 'not for girls' and she should choose an easier subject.

How could Bibha Chowdhuri's story help your cousin?

Try it first, then show the solutionSolution

Bibha excelled in physics in the 1940s, against odds.
Today women lead ISRO missions.
Interest and effort, not gender, decide success.

Answer: I would share how Bibha Chowdhuri studied cosmic rays and was nominated for a Nobel Prize at a time when few women studied at all, and how women like Ritu Karidhal Srivastava lead ISRO missions today. If my cousin loves physics, she should pursue it with confidence.

Memory hook: Talent has no gender.

Persistence without applause

Imagine you practise for a science olympiad for months but don't win, and nobody notices your effort.

What would Bibha's life teach you?

Try it first, then show the solutionSolution

She never received awards in her lifetime.
She kept working because she loved the work.
Recognition may come later; learning stays.

Answer: Bibha kept researching for decades without awards. My preparation has taught me a lot even without a prize. I should keep learning for its own sake; recognition, if it comes, is a bonus.

Memory hook: Work for the light, not the spotlight.

Writing passive reports

Say your class did an experiment on seed germination and you must write the lab report.

How should you write it, following the lesson's grammar?

Try it first, then show the solutionSolution

Use the passive for procedures.
Past tense, third person.
Focus on the action, not 'I'.

Answer: Instead of 'I soaked the seeds and I measured them', I would write 'The seeds were soaked overnight and their growth was measured daily.' The passive keeps the focus on the experiment, as scientific reports do.

Memory hook: In labs, the action is the hero.

Topics in this chapter

How the school exam asks Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science

The question patterns to expect, and the method that works for each.

Question type	How it is asked	Method
Extract-based (5 x 1 mark)	A paragraph with MCQs, inference, fact or opinion, phrase meaning and assertion-reason.	Use margin meanings (trailblazers, equitable, defied the odds, sceptical, periphery, acclaim, arduous).
Sequencing	Arrange events of her life in order.	Use the dates: 1913, 1945, 1949, 1950, 1991, 2019, 2020.
Short answer (2 marks, 40-50 words)	Why is she a pioneer? What did the Nobel nomination show? Why was she called 'beam of light'?	Point plus a date or fact.
Long answer (5 marks, 100-150 words)	Writer's purpose; women in ISRO and changing attitudes; lessons from her life.	Past vs present comparison with examples.
Grammar and writing	Antonyms, suffixes, acronyms, clipping, active/passive; report on a science exhibition.	Report: past tense, passive, third person, three paragraphs.

Tricks to remember Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science

Short memory aids. Say each one aloud once, then use it on a question the same day.

Key dates
'13-45-49-50-91-19-20': born 1913, Manchester 1945, TIFR 1949, Nobel nomination 1950, died 1991, star 2019, chair 2020.
Use it when: Timeline questions.
The four big names
'B-S-B-S': Blackett (guide), Schrödinger (nominated), Bhabha (TIFR), Sarabhai (PRL mentor).
Use it when: Names and roles.
Clipping types
'Back keeps the head, Front keeps the tail, Middle keeps the heart': exam, phone, flu.
Use it when: Clipping questions.
Passive formula
'BE + V3': is/was/were/has been + past participle.
Use it when: Voice change.

Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science: extract-based questions

Read the extract, answer every part on paper, then open the answers.

Extract 1: In the shadows

In an era marked by towering scientific discoveries, Bibha was often on the cusp of greatness but remained in the shadows of her male counterparts. Her most notable contribution was the discovery of pi-mesons, a subatomic particle.

(1) · 1 mark · MCQ
'On the cusp of greatness' means:
(a) far from success (b) very close to great achievement (c) jealous of others (d) at the end of her career
(2) · 1 mark · Short answer
Why did Bibha remain 'in the shadows'?
(3) · 1 mark · Very short answer
The passage goes on to say that in 1950 Erwin Schrödinger nominated her for a Nobel Prize; the nomination was unsuccessful but showed her remarkable talent. Who nominated her for the Nobel Prize, and when?
(4) · 1 mark · MCQ
(See the context given in the third question.) Assertion (A): The Nobel nomination was unsuccessful.
Reason (R): It still reflected her remarkable talent.
(a) Both true; R explains A (b) Both true; R does not explain A (c) A true, R false (d) A false, R true
(5) · 1 mark · Very short answer
(See the context given in the third question.) Change to passive: 'Schrödinger nominated her.'

Show the answersAnswers

(b) very close to great achievement
Her male colleagues received the attention and fame, while her work went largely unrecognised.
Erwin Schrödinger, in 1950.
(b) Both true; R does not explain A
She was nominated by Schrödinger.

Extract 2: A star named Bibha

In 2019, the International Astronomical Union (IAU) honoured her legacy by renaming a star in the constellation Leo—HD 86081—as ‘Bibha,’ meaning ‘beam of light.’

(1) · 1 mark · MCQ
The passage opens: 'The stars are not meant to remain hidden forever.' What does 'stars' mean in the first sentence?
(a) only celestial bodies (b) only famous people (c) both: real stars and brilliant people like Bibha (d) film actors
(2) · 1 mark · Very short answer
Which constellation contains the star 'Bibha'?
(3) · 1 mark · Short answer
The writer adds that, fittingly, she is now a 'star in heaven', a symbol of the light she brought to Indian science. Why is naming the star 'fitting'?
(4) · 1 mark · MCQ
IAU is an example of:
(a) clipping (b) an abbreviation of initials (c) a suffix (d) a blend
(5) · 1 mark · Very short answer
Fact or opinion: 'Fittingly, she is now a star in heaven.'

Show the answersAnswers

(c) both: real stars and brilliant people like Bibha
Leo.
Her name means 'beam of light', and she brought light to Indian science; now she literally shines as a star.
(b) an abbreviation of initials
Opinion (a judgement expressed in figurative language).

Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science: exam-level solved questions

Ordered from exam level to HOTS. Cover the solution, write your own, then compare step by step.

Example 1: Milestones, 1945-1950 · 2 marks · Short answerExam level

Describe three milestones in Bibha Chowdhuri's career between 1945 and 1950. Answer in 40-50 words. (2 marks)

Try it first, then show the solutionSolution

1945: University of Manchester, cosmic rays, Patrick M.S. Blackett.
1949: first woman faculty member at TIFR (Homi J. Bhabha).
1950: Nobel nomination by Erwin Schrödinger.

Answer: In 1945 she went to the University of Manchester to research cosmic rays under Patrick M.S. Blackett. In 1949 she became the first woman faculty member at TIFR, selected by Homi J. Bhabha. In 1950 Erwin Schrödinger nominated her for the Nobel Prize.

Example 2: A whispered name · 2 marks · Short answerHarder exam level

The lesson says her name was 'whispered only in the halls of those who recognised her brilliance'. What does this line suggest? Answer in 40-50 words. (2 marks)

Try it first, then show the solutionSolution

Only a small circle of scientists knew and valued her work.
Contrast: the world celebrated the famous men.
Her achievements stayed almost secret.

Answer: It suggests that only a small circle of scientists who knew her work valued it, and they spoke of her quietly. The wider world never celebrated her as it did the famous male scientists of her time, so her achievements stayed almost secret.

Example 3: From shadows to a star · 2 marks · Short answerHOTS / competency

How does the writer use images of light and the sky to tell Bibha Chowdhuri's story? Answer in 40-50 words. (2 marks)

Try it first, then show the solutionSolution

Name = 'beam of light'; 'lit a path'.
Cosmic rays; 'in the shadows'; 'a star in heaven'.
A journey from darkness to light.

Answer: Her name means 'beam of light', and the writer calls her 'a rare beam of light' who 'lit a path' for others. She studied cosmic rays from space, stayed 'in the shadows', and became 'a star in heaven'. The imagery turns her life into a journey from darkness to light.

Example 4: Passive voice in reports · 2 marks · Short answerHarder exam level

Rewrite in the passive: 'The organisers held the exhibition in the school hall. They displayed 120 models. The Chief Guest gave the trophy to our team.' Then explain in one sentence why the passive suits a report. (2 marks)

Try it first, then show the solutionSolution

Objects become subjects.
Past: was/were + V3.
Drop obvious doers.

Answer: The exhibition was held in the school hall. 120 models were displayed. The trophy was given to our team by the Chief Guest. The passive suits a report because it keeps the focus on the events and results rather than on who performed each action.

Example 5: A biographical sketch · 5 marks · Long answerHarder exam level

Write a short biographical sketch of Bibha Chowdhuri for a school 'Women in Science' wall, using facts from the lesson. Answer in 100-150 words. (5 marks)

Try it first, then show the solutionSolution

Birth, background and the lesson's description of her.
Bose Institute; high-energy particle physics.
Manchester 1945 (Blackett); TIFR 1949 (Bhabha); Nobel nomination 1950.
Pi-mesons; later institutes; no lifetime awards.
Recognition: the star 'Bibha' (2019).

Answer: Bibha Chowdhuri (1913-1991) was born in Kolkata at a time when Indian women struggled to get an education. The lesson calls her India's first woman physicist. Through persistence she earned a place at the Bose Institute and became the first Indian woman to excel in high-energy particle physics. In 1945 she went to the University of Manchester, where she researched cosmic rays under Nobel Laureate Patrick M.S. Blackett. In 1949 she became the first woman faculty member at TIFR, chosen by Homi J. Bhabha, and in 1950 Erwin Schrödinger nominated her for the Nobel Prize. The lesson names the discovery of pi-mesons as her most notable contribution. She later worked at the Physical Research Laboratory and the Saha Institute but received no awards in her lifetime. In 2019 a star in the constellation Leo was named 'Bibha', meaning 'beam of light'.

Example 6: Unsung heroes · 5 marks · Long answerHOTS / competency

Bibha Chowdhuri was honoured only long after her death. Suggest how schools and society can recognise such unsung heroes in their own time. Answer in 100-150 words. (5 marks)

Try it first, then show the solutionSolution

Problem: talent overlooked due to bias or lack of publicity.
Schools: include stories, name labs, invite speakers.
Media and government: awards, fair coverage.
Individuals: credit others, challenge stereotypes.
Conclusion.

Answer: Bibha's story shows that brilliant people can be overlooked because of bias or simply because no one tells their stories. Schools can help by including such pioneers in lessons, naming science labs or clubs after them, and inviting women scientists and local innovators to speak to students. Science fairs could have special prizes in their honour. The media should report fairly on achievements by women and by people from small towns, not only on famous names. Awards like the Rashtriya Vigyan Puraskar, mentioned in the lesson, can recognise scientists during their careers, not after. As individuals, we can give credit to teammates, challenge remarks like 'science is for boys' and share stories of unsung heroes online. If we recognise talent while people are alive, their work will inspire others much sooner, and no 'star' will remain hidden for decades.

Where the marks are

How a typical answer is marked: the value points the examiner looks for and the marks each earns.

Why does the writer call the journey from Bibha's era to today 'long and arduous, but also inspiring'? Answer in 40-50 words. (2 marks) (2 marks)

Step	Marks
Content: Bibha faced exclusion, received no awards and was nearly forgotten; today women lead ISRO missions to the Moon and Mars; progress inspires, though there is 'much further' to go.	1
Expression within the word limit.	1

Write a report for your school magazine on a 'Science Week' held in your school. (5 marks) (5 marks)

Step	Marks
Format: headline, reporter's name.	1
Content: organiser, date, venue, purpose, participants, chief guest, competitions, winners, remarks.	2
Organisation in three paragraphs.	1
Accuracy: past tense, passive voice, third person.	1

Where students lose marks in Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science

The slips examiners see most often, and what to write instead.

Mistake: Saying Bibha won the Nobel Prize
Confusing nomination with winning.
Wrong working
She won the Nobel Prize in 1950.
Right working
She was nominated in 1950 by Erwin Schrödinger; the nomination was unsuccessful.
Do this: Nominated is not won.
Usually costs: 1 mark.
Mistake: Mixing up Blackett and Bhabha
Several famous names.
Wrong working
Homi Bhabha guided her Ph.D. in Manchester.
Right working
Patrick M.S. Blackett guided her at Manchester; Bhabha selected her for TIFR.
Do this: Manchester = Blackett; Mumbai TIFR = Bhabha.
Usually costs: 1 mark.
Mistake: Wrong form of 'be' in the passive
Ignoring tense or number.
Wrong working
The models was displayed yesterday.
Right working
The models were displayed yesterday.
Do this: Match 'be' to the new subject and tense.
Usually costs: 1 mark.
Mistake: Report in first person and present tense
Writing like a diary.
Wrong working
I see many models and we are very happy.
Right working
Many models were displayed, and the students were appreciated.
Do this: Past tense, passive, third person.
Usually costs: 1-2 marks of 5.

Practice questions on Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQExam level
Where and when was Bibha Chowdhuri born?
(a) Mumbai, 1923 (b) Kolkata, 1913 (c) Manchester, 1913 (d) Ahmedabad, 1945
Hint
Opening section.
Answer
(b) Kolkata, 1913
Q2 · 1 mark · Very short answerExam level
Who personally selected Bibha for TIFR?
Hint
Founder figure of Indian nuclear science.
Answer
Homi J. Bhabha.
Q3 · 1 mark · Very short answerExam level
Who is called the 'Rocket Woman of India', and name one mission she worked on.
Hint
ISRO.
Answer
Dr Ritu Karidhal Srivastava; Mars Orbiter Mission (or Chandrayaan-2 or Chandrayaan-3).
Q4 · 1 mark · Very short answerHarder exam level
Add the right suffix (-ship, -ment, -hood): (i) citizen (ii) entertain (iii) brother (iv) partner
Hint
One suffix each.
Answer
(i) citizenship (ii) entertainment (iii) brotherhood (iv) partnership
Q5 · 1 mark · Very short answerHarder exam level
Give the antonyms from the lesson: (i) terrestrial (ii) dependent (iii) effortless
Hint
c..., a..., a...
Answer
(i) celestial (ii) autonomous (iii) arduous
Q6 · 2 marks · Short answerHarder exam level
Change the voice: (i) 'Scientists study cosmic rays.' (ii) 'The Government of India declared a chair professorship in her name.'
Hint
Present: is/are + V3; past: was + V3.
Answer
(i) Cosmic rays are studied by scientists. (ii) A chair professorship was declared in her name by the Government of India.
Q7 · 1 mark · Very short answerHarder exam level
Write the full forms of the clipped words and name the type: (i) ad (ii) bike (iii) flu
Hint
Back, front, middle.
Answer
(i) advertisement, back clipping (ii) motorbike, front clipping (iii) influenza, middle clipping
Q8 · 2 marks · Short answerHOTS / competency
The lesson says there is still 'much further' to go for women in science. Suggest two remaining barriers and one solution, in about 50 words.
Hint
Think of school, family, workplace.
Answer
Sample: Some girls are still discouraged from choosing science or engineering, and women scientists may get fewer leadership roles or face pressure to give up careers after marriage. Mentorship programmes that connect schoolgirls with women scientists, along with flexible workplace policies, can help close the gap.
Q9 · 2 marks · Short answerHOTS / competency
Imagine Bibha Chowdhuri could see Chandrayaan-3 land. Write three sentences she might say to the women scientists of ISRO.
Hint
Pride, struggle, advice.
Answer
Sample: 'When I studied cosmic rays, few believed a woman belonged in a laboratory. Today you have guided a spacecraft to the Moon, and my heart is full. Keep your eyes on the sky and your hands steady, and make sure no girl's talent is ever hidden again.'
Q10 · 5 marks · Long answerHarder exam level
As student editor, write a report (120-150 words) on a 'Women in Science' talk held in your school.
Hint
Headline, byline, three paragraphs; past, passive, third person.
Answer
Points: headline and byline; para 1: talk organised by the Science Club, date, venue, purpose; para 2: speaker (a woman scientist), topics (her journey, pioneers like Bibha Chowdhuri, ISRO missions), student questions; para 3: vote of thanks, students' reactions, impact (girls signing up for the robotics club). Use passive forms such as 'was organised', 'were asked'.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.Where did Bibha study cosmic rays in 1945?Show answer
The University of Manchester.
2.What particle is named as her most notable contribution?Show answer
Pi-mesons, a subatomic particle.
3.Which Indian institute did she first earn a place at?Show answer
The Bose Institute.
4.Name two other institutes where she worked.Show answer
Physical Research Laboratory (Ahmedabad) and Saha Institute of Nuclear Physics (Kolkata).
5.When did she die?Show answer
In 1991.
6.What did the Government of India do in 2020?Show answer
Declared a chair professorship in her name.
7.How many women contributed to Chandrayaan-3, according to the lesson?Show answer
Over 50.

Quick revision checklist

The night before the exam: can you do each of these without looking?

Biographical text; Poorvi Unit 5, Science and Curiosity.
Bibha Chowdhuri: born 1913, Kolkata; called India's first woman physicist.
Bose Institute; first Indian woman to excel in high-energy particle physics.
1945 Manchester, cosmic rays, under Patrick M.S. Blackett.
1949 first woman faculty at TIFR (Homi J. Bhabha); 1950 Nobel nomination (Schrödinger).
PRL Ahmedabad (Vikram Sarabhai), Saha Institute, Kolar Gold Mines; no lifetime awards; died 1991.
2019: star HD 86081 in Leo named 'Bibha' (beam of light); 2020 chair professorship.
Today: Ritu Karidhal Srivastava, 'Rocket Woman of India'; 50+ women on Chandrayaan-3.
Grammar: antonyms, -ship/-ment/-hood, acronyms, clipping, active/passive.
Writing: report (headline, byline, three paragraphs, past passive third person).

Bibha Chowdhuri: The Beam of Light that Lit the Path for Women in Indian Science: frequently asked questions

Who was Bibha Chowdhuri?

An Indian physicist, born in Kolkata in 1913, described in Poorvi as India's first woman physicist. She researched cosmic rays and subatomic particles and was the first woman faculty member at TIFR.

Why is a star named after her?

In 2019 the International Astronomical Union renamed the star HD 86081 in the constellation Leo as 'Bibha' ('beam of light') to honour her contributions.

Did Bibha Chowdhuri win a Nobel Prize?

No. Erwin Schrödinger nominated her in 1950, but the nomination was unsuccessful. She received no awards in her lifetime.

How is she linked to women in ISRO today?

The lesson says the success of women scientists such as Dr Ritu Karidhal Srivastava and the 50-plus women of Chandrayaan-3 is built on pioneers like her.

What is the writing task?

A report for the school magazine on a Zonal Science Exhibition, written in past tense, passive voice and third person.

Based on: NCERT Poorvi, Textbook of English for Grade 8 (Reprint 2026-27); NCERT unit PDF: Poorvi Unit 5