1. The machine-Gun was invented by –
(a) J.L. Bore
(b) G. Brousa
(c) Karl Benz
(d) James Puckle
[U.P.P.C.S. (Mains) 2014]
Ans. (d) James Puckle
- In 1718, James Puckle from England came up with a protective gun, which was an important step in the development of machine guns.
- He patented it as the Defense Gun.
- Historians disagree on whether it was the first type of hand-operated, rotating machine gun, but it was the most advanced of its kind at the time.
|
2. Who invented the thermoscope, an early form of thermometer?
(a) Sir Christopher Wren
(b) Charles F. Richter
(c) Galileo
(d) Beno Gutenberg
[M.P.P.C.S. (Pre) 2010]
Ans. (c) Galileo
- Galileo, the famous Italian physicist, invented the thermometer or thermoscope in 1609.
|
3. Telescope was invented by :
(a) Galileo
(b) Gutenberg
(c) Edison
(d) Graham Bell
[U.P.P.C.S. (Pre) 1994]
Ans. (a) Galileo
- Galileo created the telescope in 1609.
|
4. The microscope is used for the study of?
(a) Distant objects
(b) Nearby objects
(c) Small objects
(d) Micro and nearby objects
[M.P.P.C.S. (Pre) 2015]
Ans. (d) Micro and nearby objects
- A microscope is a tool that allows you to see things that are too small to be seen without it.
|
5. Which is the biggest telescope in the world?
(a) Galileo
(b) Ice Cube
(c) Discovery
(d) Challenger
[U.P. U.D.A./L.D.A. (Spl) (Pre) 2010]
Ans. (b) Ice Cube
- In 2010, the University of Wisconsin built the Ice Cube telescope, which is the largest neutrino telescope in the world.
|
6. Match the following :
| A. Typewriter |
1. Davy |
| B. X-ray |
2. Sholes |
| C. Radio |
3. Rontgen |
| D. Safety Lamp |
4. Marconi |
Code :
|
A |
B |
C |
D |
| (a) |
2 |
3 |
4 |
1 |
| (b) |
1 |
2 |
3 |
4 |
| (c) |
3 |
4 |
1 |
2 |
| (d) |
4 |
1 |
2 |
3 |
[M.P.P.C.S. (Pre) 1999]
Ans. (a) 2341
-
| Typewriter |
Sholes |
| X-ray |
Rontgen |
| Radio |
Marconi |
| Safety Lamp |
Davy |
|
7. Wilhelm Roentgen invented –
(a) Radio
(b) X-Ray Machine
(c) Electric Bulb
(d) Electric Motor
[U.P.P.C.S. (Pre) 2005]
Ans. (b) X-Ray Machine
- In December 1895, Röntgen did a lot of hard work and found out about X-rays, which could go through thick objects.
- He gave them the name “X-rays” to show that their true nature wasn’t known.
|
8. Who among the following scientists shared the Nobel Prize in physics with his son ?
(a) Max Plank
(b) Albert Einstein
(c) William Henry Bragg
(d) Enrico Fermi
[I.A.S. (Pre) 2008]
Ans. (c) William Henry Bragg
- Sir William Henry Bragg, a British physicist and chemist, won the Nobel Prize in Physics in 1915 along with his son William Lawrence Bragg.
- Together, they created a tool called an X-ray spectrometer which could be used to examine the internal structure of crystals with X-rays.
|
9. Match the following
| A. John Guttenberg |
1. Telephone |
| B. W.C. Rontgen |
2. Printing Press |
| C. Michael Faraday |
3. X-Ray |
| D. Alexander Graham Bell |
4. Dynamo |
Code :
|
A |
B |
C |
D |
| (a) |
1 |
2 |
3 |
4 |
| (b) |
2 |
3 |
1 |
4 |
| (c) |
3 |
4 |
1 |
2 |
| (d) |
2 |
3 |
4 |
1 |
| (e) |
2 |
4 |
3 |
1 |
[Chhattisgarh P.C.S (Pre) 2013]
Ans. (d) 2341
- The correctly matched list is given below :
| John Guttenberg |
Printing Press |
| W.C. Rontgen |
X-Ray |
| Michael Faraday |
Dynamo |
| Alexander Graham Bell |
Telephone |
|
10. Who invented the Steam Engine?
(a) Robert Watson
(b) James Watt
(c) William Harvey
(d) None of the above
[Uttarakhand U.D.A./L.D.A. (Pre) 2007]
Ans. (b) James Watt
- In the late 1700s, Thomas Savery from England invented a machine that used steam to pump out water.
- Thomas Newcomen improved this design in 1712, and then James Watt made even bigger changes to it in 1763.
- Because of his work, James Watt is seen as the creator of the steam engine.
|
11. ‘Telephone’ was invented by –
(a) Graham Bell
(b) Hoffman
(c) Wilson
(d) George Stephenson
[M.P.P.C.S. (Pre) 1995]
Ans. (a) Graham Bell
- Alexander Graham Bell invented the telephone in 1876.
|
12. Who discovered the electric bulb?
(a) Thomas Edison
(b) Alexander Graham Bell
(c) William Cooke
(d) Terry Addison
[M.P.P.C.S. (Pre) 2010]
Ans. (a) Thomas Edison
- Thomas Alva Edison, an American scientist, created the electric light bulb.
|
13. The gas engine was invented by :
(a) Diesel
(b) Davy
(c) Daimler
(d) Charles
[U.P.P.C.S. (Pre) 1995]
Ans. (c) Daimler
- Rudolph Diesel created the Diesel engine in 1895 and Gottlieb Daimler invented the gas engine in 1885.
|
14. Who was the inventor of the fountain pen?
(a) Waterman
(b) Parker
(c) Chelpark
(d) Shaef ers
[M.P.P.C.S. (Pre) 2005]
Ans. (a) Waterman
- Lewis Edson Waterman created the fountain pen in 1883 in New York and was granted a patent for it in 1884.
- It was the first-ever practical fountain pen.
|
15. Who was the inventor of Radar –
(a) Robert Watson
(b) Fleming
(c) Bush Wall
(d) Austin
[48th to 52nd B.P.S.C. (Pre) 2008]
Ans. (a) Robert Watson
- Scottish physicist Robert Alexander Watson was a leader in the invention of Radar (Radio Detection and Ranging).
- In 1935, he made the first Radar system, which was used a lot by the Royal Air Force of Britain during World War II.
|
16. Alfred Nobel invented –
(a) Microphone
(b) Typewriter
(c) Dynamite
(d) Gramophone
[M.P.P.C.S. (Pre) 1995]
Ans. (c) Dynamite
- Alfred Nobel, a scientist from Sweden, invented dynamite.
- He set up the well-known Nobel Foundation in his will in 1900.
|
17. Who discovered Television?
(a) Edison
(b) Galileo
(c) Baird
(d) Franklin
[M.P.P.C.S. (Pre) 1995]
Ans. (c) Baird
- J.L. Baird created television in 1926 in the United Kingdom.
- Galileo developed the Telescope.
|
18. With what invention is the name of J.L. Baird associated?
(a) Barometer
(b) Helicopter
(c) Television
(d) Telephone
[M.P.P.C.S. (Pre) 1998]
Ans. (c) Television
- John Logie Baird (1888-1946) is famous for creating the first television system that actually worked.
- He showed it off for the first time on January 26, 1926, and then later presented the first-ever color transmission on July 3,
|
19. Who among the following invented the Laser?
(a) Theodore Maiman
(b) Denis Papin
(c) William Morton
(d) Francis Crick
[Uttarakhand Lower Sub. (Pre) 2010, I.A.S. (Pre) 2005]
Ans. (a) Theodore Maiman
- Theodore Maiman created the laser on May 16th, 1960 in his laboratory at Hughes in Malibu.
- He showed that light could be amplified by stimulating radiation emissions.
|
20. Which one of the following pairs is NOT correctly matched?
(a) James Watt: Steam Engine
(b) A.G. Bell: Telephone
(c) J.L. Baird: Television
(d) J. Perkins: Penicillin
[U.P.P.C.S (Pre) 2011]
Ans. (d) J. Perkins: Penicillin
- Alexander Fleming, a Scottish scientist, found penicillin.
- The other pairs are correctly matched.
|
21. Who is the discoverer of Penicillin?
(a) Alexander Graham Bell
(b) Alexander Fleming
(c) Christopher Macdonald
(d) Albert Einstein
[M.P.P.C.S. (Pre) 2010]
Ans. (b) Alexander Fleming
- In 1928, Scottish doctor and scientist Alexander Fleming discovered a type of antibiotic called penicillin.
- He was working with the flu virus at St. Mary’s Hospital in London when he made the breakthrough.
- Penicillin was the first antibiotic medicine that worked well against many different types of infections.
|
22. Alexander Fleming discovered-
(a) Penicillin
(b) X-ray
(c) Streptomycin
(d) Telephone
[M.P.P.C.S. (Pre) 2015]
Ans. (a) Penicillin
- Alexander Fleming from Scotland, who was a bacteriologist, made the discovery of penicillin in 1928.
- This discovery then led to antibiotics being created, which drastically decreased the amount of deaths caused by infection.
|
23. Match the following in the correct order –
| A. Radium |
1. Alexander Fleming |
| B. Penicillin |
2. Madam Curie |
| C. X-Ray |
3. Edward Jenner |
| D. Measles |
4. W.C. Roentgen |
Code :
|
A |
B |
C |
D |
| (a) |
2 |
1 |
4 |
3 |
| (b) |
2 |
3 |
4 |
1 |
| (c) |
3 |
4 |
1 |
2 |
| (d) |
4 |
1 |
2 |
3 |
[U.P. P.C.S. (Pre) 1992]
Ans. (a) 2143
-
| Radium |
Pierre Curie and Madam Curie |
| Penicillin |
Alexander-Fleming in 1928 |
| X-Ray |
W.C. Roentgen in 1895 |
| Measles |
Edward Jenner in 1796 |
|
24. Who among the following is the inventor of ‘X’ rays?
(a) Rutherford
(b) Roentgen
(c) Maxwell
(d) Torricelli
[Uttarakhand U.D.A./L.D.A. (Pre) 2003]
Ans. (b) Roentgen
- In 1895, Wilhelm Conrad Roentgen, a German physicist and professor of physics at Wurzburg, Bavaria, made a groundbreaking discovery – X-rays.
|
25. Arrange the following in chronological order as per their discovery and select the correct answer from the code given below:
A. Transistor
B. Diode
C. SMD (Surface Mounted Device)
D. Integrated Circuit (IC)
Code :
(a) A, B, C, D
(b) B, A, C, D
(c) B, A, D, C
(d) A, C, B, D
[U.P. R.O./A.R.O. (Mains) 2016]
Ans. (c) B, A, D, C
- In 1947, John Bardeen and Walter Brattain, two American physicists working with William Shockley at Bell Labs in the US, invented the transistor.
- The three of them shared the Nobel Prize in Physics in 1956 for this achievement.
- John Ambrose Fleming created the first working diode in 1904.
- IBM developed the Surface Mounted Device (SMD) in the 1960s.
- Jack Kilby and Robert Noyce created the first functioning integrated circuits in 1958 and 1959, respectively.
- This makes option (c) the correct chronological order.
|
26. Match List-I with List-II and select the correct answer using the codes given below :
| List-I |
List-II |
| A. Alfred Nobel |
1. Theory of Evolution |
| B. Alexander Fleming |
2. Dynamite |
| C. Charles Darwin |
3. Penicillin |
| D. Madam Curie |
4. Isolation of radium |
Code :
|
A |
B |
C |
D |
| (a) |
1 |
2 |
3 |
4 |
| (b) |
2 |
3 |
1 |
4 |
| (c) |
3 |
2 |
1 |
4 |
| (d) |
1 |
4 |
3 |
2 |
[U.P.P.C.S. (Mains) 2010]
Ans. (b) 2314
-
| Alfred Nobel – Alfred Bernhard Nobel was a Swedish chemist engineer, innovator |
Dynamite |
| Alexander Fleming – Alexander Fleming was a Scottish biologist |
Penicillin |
| Charles Darwin – Charles Darwin was an English naturalist and geologist |
Theory of Evolution |
| Madam Curie – Madam Curie was a Polish and naturalized French physicist and chemist |
Isolation of radium |
|
27. The principle of ‘Black hole’ was enunciated by :
(a) C.V Raman
(b) H.J. Bhabha
(c) S. Chandrashekhar
(d) H. Khurana
[U.P.P.C.S (Pre) 2011]
Ans. (c) H.J. Bhabha
- Subrahmanyam Chandrasekhar, an Indian-American astrophysicist, is well-known for his work on the ‘Chandra Sekhar Limit’.
- He used the ideas of Albert Einstein’s Special Theory of Relativity and Quantum Physics to come to this conclusion.
- He concluded that a white dwarf star can’t be stable if it is bigger than 1.44 times the mass of our sun.
- If the star has more mass than that, it will become a neutron star or a black hole at the end of its life.
- For this work, he was awarded the 1983 Nobel Prize in Physics, alongside William A. Fowler.
|
28. Scientist S. Chandrashekhar got the Nobel Prize for which field?
(a) Astrophysics
(b) Micro-electronics in Satellites
(c) Superconductivity at low temperatures
(d) Studies of the Core of the sun.
[M.P.P.C.S. (Pre) 1996]
Ans. (a) Astrophysics
- Subrahmanyan Chandrasekhar was awarded the 1983 Nobel Prize in Physics for his research on how stars form and grow.
- He shared the prize with William Fowler.
|
29. Which of the following scientists proved that the stars with mass less than 1.44 times the mass of the sun end up as White Dwarfs when they die?
(a) Edwin Hubble
(b) S. Chandra Shekhar
(c) Stephen Hawking
(d) Steven Weinberg
[I.A.S. (Pre) 2009]
Ans. (b) S. Chandra Shekhar
- S. Chandrasekhar found that stars with a mass less than 1.44 times the mass of the sun will become white dwarfs when they die.
- He also showed that a white dwarf cannot be more than 1.44 times the mass of the sun.
|
30. The photoelectric effect was discovered by :
(a) Hertz
(b) Einstein
(c) Plank
(d) Bohr
[U.P.P.C.S. (Mains) 2003]
Ans. (a) Hertz
- The photoelectric effect is when something gives off electric particles when it is exposed to light.
- This was discovered in 1887 by German Physicist Heinrich Rudolf Hertz and is also sometimes called the Hertz effect.
|
31. Scientist Albert Einstein is famous for –
(a) The interpretation of the atomic structure of hydrogen
(b) The photoelectric effect
(c) Planting the first Nuclear Reactor
(d) The prediction of the existence of neutrons
[38th B.P.S.C. (Pre) 1992]
Ans. (b) The photoelectric effect
- Albert Einstein, a scientist, became famous for providing a straightforward and accurate description of the Photoelectric Effect using Planck’s Quantum Theory.
- He was rewarded with the Nobel Prize in Physics in 1921 for this achievement.
|
32. Einstein was awarded the Nobel Prize for –
(a) Theory of relativity
(b) Brownian motion
(c) Photoelectric effect
(d) Specific heat of solids
[U.P.P.C.S. (Pre) 2015]
Ans. (c) Photoelectric effect
- In 1921, Albert Einstein was awarded the Nobel Prize in Physics in recognition of his work in Theoretical Physics, particularly his finding of the law of the photoelectric effect.
|
33. Einstein was awarded the Nobel Prize for which of his theories?
(a) Theory of relativity
(b) Theory of photoelectricity
(c) Theory of specific heats
(d) Theory of Brownian motion
[U.P. P.C.S. (Pre) 2018]
Ans. (b) Theory of photoelectricity
- Albert Einstein was awarded the 1921 Nobel Prize in Physics for his work on the photoelectric effect, which he first presented in 1905, alongside his special theory of relativity.
|
34. In Einstein’s equation, E = mc2, c denotes –
(a) Velocity of sound
(b) Speed of light
(c) Wavelength
(d) A constant
[Uttarakhand P.C.S. (Pre) 2007]
Ans. (b) Speed of light
- Einstein’s equation states that any form of mass is equal to energy.
- This is shown by the formula:
- E = mc2, where E stands for energy, m stands for mass, and c stands for the speed of light.
|
35. Albert Einstein was proficient in playing which musical instrument?
(a) Guitar
(b) Flute
(c) Violin
(d) Sitar
[Uttarakhand P.C.S. (Pre) 2007]
Ans. (c) Violin
- Albert Einstein was talented at playing the violin and piano.
|
36. The fourth dimension in Physics was introduced by
(a) Newton
(b) Einstein
(c) Galileo
(d) Neil Bohr
[Uttarakhand P.C.S. (Pre) 2007]
Ans. (b) Einstein
- Time is seen as an additional dimension, alongside length, width, and depth.
- This thought of time as a fourth dimension is usually credited to Albert Einstein’s ‘Theory of Special Relativity’ which he proposed in 1905.
|
37. Sir C.V. Raman received the Nobel Prize for physics in the year
(a) 1928
(b) 1930
(c) 1932
(d) 1950
[42nd B.P.S.C. (Pre) 1997]
Ans. (b) 1930
- In 1930, C.V. Raman became the first person from Asia and India to be awarded the Nobel Prize in Physics for his work on the scattering of light and the discovery of the Raman Effect.
- Every year, February 28th is celebrated as National Science Day to commemorate the day in 1928 when he discovered the ‘Raman Effect’.
|
38. An eminent Indian physicist Dr. C. V. Raman was given the Nobel Prize for his work in the year –
(a) 1925
(b) 1930
(c) 1935
(d) None of these
[Uttarakhand U.D.A./L.D.A. (Pre) 2007]
Ans. (b) 1930
- Indian physicist Sir Chandrasekhara Venkata Raman (C.V. Raman) was the first non-white, Asian, and Indian person to receive the Nobel Prize in Physics in 1930.
- This was due to his discovery of the Raman effect, which happens when light passes through a material and is scattered with a change in wavelength due to an energy state transition in the material’s molecules.
|
39. The National Science Day is observed on February 28 every year to commemorate :
(a) Raman-effect day
(b) The launch of the first artificial satellite Aryabhatta
(c) The successful launch of ASLV
(d) Homi J. Bhabha’s birthday
[U.P. P.C.S. (Pre) 2003, U.P. U.D.A./L.D.A. (Pre) 2002, U.P. P.C.S. (Pre) 1990, U.P. P.C.S. (Pre) 1993]
Ans. (a) Raman-effect day
- In India, National Science Day is celebrated on February 28th each year to commemorate the discovery of the Raman effect by Indian physicist Sir C. V. Raman on this date in 1928.
- Sir C.V. Raman was awarded the Nobel Prize in Physics for this discovery in 1930.
|
40. ‘The National Science Day’ is observed on
(a) January, 28
(b) February, 28
(c) March, 28
(d) April, 28
[Uttarakhand P.C.S. (Mains) 2006, U.P. Lower Sub. (Spl.) (Pre) 2004, U.P. Lower Sub. (Spl.) (Pre) 2002, U.P. Lower Sub. (Spl.) (Pre) 2003]
Ans. (b) February, 28
- In India, National Science Day is celebrated annually on the 28th of February to commemorate the finding of the Raman effect by Indian physicist Sir C. V. Raman on the same date in 1928.
|
41. Which scientist’s birthday is celebrated as the ‘National Science Day’?
(a) Ramanujan
(b) Prof. S. Chandrashekhar
(c) C.V. Raman
(d) Dr. H.J. Bhabha
[M.P. P.C.S. (Pre) 2004]
Ans. (c) C.V. Raman
- India celebrates National Science Day on February 28 each year to honor the work of Indian physicist Sir C. V. Raman, who discovered the Raman effect on this day in 1928.
|
42. Whose birth centenary was celebrated in the year 1988-
(a) Charles Darwin
(b) Einstein’s theory of relativity
(c) Mathematician Ramanujan
(d) C.V. Raman
[U.P.P.C.S. (Pre) 1991]
Ans. (d) C.V. Raman
- Charles Darwin (February 12, 1809 – April 19, 1882)
Ramanujan (December 22, 1887 – April 26, 1920)
Einstein proposed the theory of relativity in 1905.
C.V. Raman (November 7, 1888 – November 21, 1970)
- It is obvious that C.V. Raman’s 100th birthday was celebrated in 1988.
|
43. A recent movie titled The Man Who Knew Infinity is based on the biography of
(a) S. Ramanujan
(b) S. Chandrashekhar
(c) S. N. Bose
(d) C.V. Raman
[I.A.S. (Pre) 2016]
Ans. (a) S. Ramanujan
- The Man Who Knew Infinity is a 2015 British movie based on the book with the same title written in 1991.
- Dev Patel plays Srinivasa Ramanujan, a real-life mathematician who was born into a poor family in Madras and eventually became a famous mathematician at Cambridge University.
|
44. Who among the following scientists propounded the New Theory of Relativity?
(a) J. V. Narlikar
(b) M. M. Krishnan
(c) S. Chandrashekhar
(d) B. D. Nag Choudhary
[U.P. P.C.S. (Mains) 2016]
Ans. (a) J. V. Narlikar
- J.V. Narlikar and Fred Hoyle, an experienced scientist, created a new version of Einstein’s Theory of Relativity called the ‘New Theory of Relativity’.
|
45. According to J.V. Narlikar which of the following has so far NOT been considered as a science?
(a) Astrology
(b) Astronomy
(c) Cosmology
(d) Nanotechnology
[U.P. P.C.S. (Pre) 2018]
Ans. (a) Astrology
- Indian astrophysicist Jayant Vishnu (J.V.) Narlikar has said that astrology is not a scientific field.
|
46. Who is called the Father of Atomic Energy in India?
(a) Prof. Satish Dhawan
(b) Homy J. Bhabha
(c) Dr.K.S. Krishna
(d) None of the above
[Uttarakhand U.D.A./L.D.A. (Pre) 2007]
Ans. (b) Homy J. Bhabha
- Homi Jehangir Bhabha was an Indian nuclear physicist who made a big impact on India’s nuclear energy program.
- He is widely known as the father of India’s nuclear program.
|
47. The Homi Bhabha Award is given for special contribution in the field of –
(a) Theoretical Physics
(b) Nuclear Energy
(c) Laser Physics
(d) Space Research
[U.P.P.C.S.(Pre) 2012]
Ans. (b) Nuclear Energy
- Homi Jehangir Bhabha was an important figure in the development of nuclear energy in India.
- So, the ‘Homi Bhabha Award’ is given to scientists who have made a significant contribution to the field of nuclear energy in his honor.
|
48. Stephen Hawking is a –
(a) Pianist
(b) Guitarist
(c) Scientist
(d) American politician
[M.P.P.C.S. (Pre) 2010]
Ans. (c) Scientist
- Stephen William Hawking (8 January 1942 – 14 March 2018) was a very famous British scientist, cosmologist, and writer.
- At the time of his death, he was the director of research at the Centre for Theoretical Cosmology at the University of Cambridge.
- He was well known for his work on black holes and for writing many popular science books.
- He unfortunately had Amyotrophic Lateral Sclerosis (ALS), commonly known as motor neuron disease.
|
49. Which one of the following scientists has carried out research both in the field of biology and physics?
(a) Jagdish Chandra Bose
(b) Har Govind Khurana
(c) C. V. Raman
(d) Homi J. Bhabha
[U.P. Lower Sub. (Pre) 2008]
Ans. (a) Jagdish Chandra Bose
- Jagdish Chandra Bose was a famous Indian scientist who studied biology and physics.
- He made big discoveries in botany, radio, and microwaves.
- He also invented the Crescograph, which was used to measure the growth of plants through a series of gears that moved clockwise.
|
50. Match the names of outstanding Indian scientists given in List I with an area of their specialized work given in List II.
select the correct answer by using the codes given below the lists :
| List-I |
List-II |
| A. Dr. Raja Ramanna |
1. Plant chemistry |
| B. Dr. M.S. Swaminathan |
2. Nuclear physics |
| C. Prof. U.R. Rao |
3. Thermodynamics and astrophysics |
| D. Prof. Meghnad Saha |
4. Space research |
| |
5. Agricultural science |
Code :
|
A |
B |
C |
D |
| (a) |
3 |
5 |
2 |
1 |
| (b) |
2 |
1 |
4 |
3 |
| (c) |
2 |
5 |
4 |
3 |
| (d) |
2 |
1 |
4 |
2 |
[I.A.S. (Pre) 1998]
Ans. (c) 2543
-
| Dr. Raja Ramanna |
Nuclear physics |
| Dr. M.S. Swaminathan |
Agricultural science |
| Prof. U.R. Rao |
Space research |
| Prof. Meghnad Saha |
Thermodynamics and astrophysics |
|
51. The principle of Thermal Ionisation is an outstanding contribution of
(a) H.J. Bhabha
(b) M.N. Saha
(c) C.V. Raman
(d) J.C. Bose
[U.P.P.C.S. (Mains) 2014]
Ans. (b) M.N. Saha
- M.N. Saha developed the Thermal Ionization of gases theory in three papers published in 1920 and 1921.
- This theory has been used to understand the sun’s spectrum and was successful in explaining the properties of stars and their spectra.
|
52. Who is associated with the development of India’s Atomic Bomb :
(a) A.P.J. Abdul Kalam
(b) Homi Bhabha
(c) Raja Ramanna
(d) Kastoorirangan
[U.P. Lower Sub. (Pre) 2004, U.P.P.C.S. (Pre) 2002]
Ans. (c) Raja Ramanna
- Dr. Raja Ramanna, an Indian physicist, had a big role in the making of India’s Atomic Bomb.
- He was in charge when the first nuclear test (named ‘Smiling Buddha’) happened in 1974.
- Later, he worked as director of DRDO and also as Scientific Advisor to India’s Defence Minister in 2000.
|
53. Who is not a Nobel Prize winner among the following scientists?
(a) Har Govind Khorana
(b) C.V. Raman
(c) S. Chandrashekhar
(d) Jagdish Chandra Bose
[U.P.P.C.S. (Mains) 2006]
Ans. (d) Jagdish Chandra Bose
- Dr. Har Gobind Khorana received the Nobel Prize for Medicine in 1968.
- Sir Chandrasekhara Venkata Raman won the Nobel Prize for Physics because of his work on light scattering in 1930.
- Subrahmanyan Chandrasekhar was given the Nobel Prize for Physics in 1983.
- Jagdish Chandra Bose was not a Nobel Prize winner.
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