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Test Your Knowledge
Properties of Light
BHASKAR KANSERI
1.
Which one of them is an example of wave nature of 12. Which one of these devices could be used to separate
light
the desired spectral line
a) Compton effect
b) Photo-electric effect
a. Spectrometer
b. Spectrograph
c) Interference
d) None of the above
c. Monochromator
d. Spectrophotometer
2.
Which property of light signifies the transverse nature 13. Bending of light at sharp obstacles is called
of electric field vibrations
a. Dispersion
b. Diffraction
a) Interference
b) Polarization
c. Deviation
d. None of the above
c) Diffraction
d) Dispersion
14. The rear view mirror, which is used in automobiles, is a
a. Concave mirror
b. Convex mirror
Matter waves were proposed by
c. Plane mirror
d. Plano-convex mirror
a) Young
b) De-Broglie
c) Einstein
d) Heisenberg
15. In secondary rainbow, we have
a. Two refractions, two reflections
Which one of them is an example of particle nature of
b. One refraction, two reflections
light
c. Two refractions, one reflection
a) Interference
b) Diffraction
d. One refraction, one reflection
c) Dispersion
d) Photo-electric effect
16. Which waves are also called “waves of heat energy”
Laws showing relation between polarization and
a. Radio waves
b. Ultraviolet
interference are called
c. Infrared
d. Microwaves
a) Fresnel’s laws
b) Rayleigh’s laws
17. Which one of them acts as a demagnifier
c) Fresnel and Arago laws
a. Convex lens
b. Concave lens
d) Zernike’s laws
c. Plano-convex lens
d. None of the above
3.
4.
5.
6.
Uncertainty relation was proposed by
a. Heisenberg
b. Einstein
c. Young
d. De-Broglie
7.
Interference is not affected by which property of the
superposing waves
a. Frequency
b. Polarization
c. Phase
d. None of the above
8.
Particles having velocity faster than light are called
a. Baryons
b. Tachyons
c. Mesons
d. Photons
9.
Einstein received the Nobel Prize in 1921 for which
contribution?
a. Special theory of relativity
b. Mass-energy equivalence
c. Photo-electric effect
d. Brownian motion of particles
10. Which one of these is not a unit of distance?
a. Phot
b. Light year
c. Parsec
d. None of these
11. Which one of these colours scatters most
a. Red
b. Yellow
c. Blue
d. Violet
18. In day time, sky appears blue due to
a. Scattering of light
b. Reflection of light
c. Diffraction of light
d. None of these
19. Which one of these gives monochromatic light
a. Mercury lamp
b. Tungsten-Halogen lamp
c. Sodium lamp
d. None of the above
20. When light passes through a prism, the colour that
deviates
the least is
a. Blue
b. Violet
c. Green
d. Red
ANSWERS:
1. c
2. b
3. b
4. d
5. c
6. a
7. d
8. b
9. c
10. a
11. d
12. c
13. b
14. b
15. a 16. c
17. b
18. a
19. c
20. d
Contributed by Shri Bhaskar Kanseri, SRF-NET (CSIR), National
Physical Laboratory, Dr K S Krishnan Marg, New Delhi-110012
SCIENCE REPORTER, January 2010
43
Test Your Knowledge
Mixed Bag
BANITA RANI SINGH
1.
The branch of science that deals with the study of
grasses?
a) Anatomy
b) Agrology
c) Agrostology
d) Agro biology
2.
Chemical composition of Gunmetal is:
a) Cu(80%)Sn(15%),Zn(5%)
b) Cu(75%)Sn(10%)Zn(15%)
c) Cu(82%)Sn(8%)Zn(10%)
d) Cu(88%),Sn(10%)Zn(2%)
3.
4.
5.
Which is not an allotropic modification of
Phosphorous?
a) Pink
b) Black
c) White
d) Red
What is Glass?
a) It is a transparent super cooled mixture of Silicates
b) It is a transparent super heated mixture of Silicates
c) It is a transparent mixture of carbonates & silicates
d) It is a transparent super heated mixture of
carbonates & silicates
In a vacuum, a coin and a feather are dropped
simultaneously, which reaches the bottom first:
a) Feather
b) Coin
c) Any of the above
d) Both at the same time
6.
Who is known as the Father of Antibiotics?
a) Alexander Fleming
b) Pasteur
c) William Harvey
d) Darwin
7.
Hereditary disease in which blood fails to clot:
a) Anemia
b) Beri-Beri
c) Hemolysis
d) Haemophilia
8.
9.
The first link in any food chain is always a green plant
because:
a) They make their own food
b) They are fixed at one place
c) They don’t eat anything
d) They are more in number
B.O.D. test is for:
a) Quality of air
c) Quantity of water
b) Quality of water
d) Quality of fog
10. Plants that grow in saline habitat are known as:
a) Halophytes
b) Lithophytes
c) Hydrophytes
d) Aquatic
11. Longest cell in the human body is:
a) Leg muscle cell
b) Nerve cell
c) Stomach muscle cell d) Intestine cell
44
SCIENCE REPORTER, January 2010
12. Oxygen is transported by blood…
a) Combined with hemoglobin
b) Dissolved in protoplasm
c) Dissolved in cytoplasm
d) With plasma
13. Atom bomb was invented by:
a) Otto Hahn
b) Hargovind Khurana
c) Alfred Nobel
d) Fermi
14. Crescograph measures:
a) Heart beat
c) Growth of plants
b) Pulse rate
d) None
15. Gas used in air conditioning is:
a) Freon
b) Ammonia
c) Nitrogen
d) Helium
16. Celestial globe was discovered by:
a) Atlas
b) Galileo
c) Schwann
d) Pascal
17. Wood is the product of:
a) Xylem
c) Secondary xylem
b) Phloem
d) Secondary phloem
18. What is a black hole?
a) A huge black star with nil surface gravity
b) A star with large surface gravity
c) A star which has collapsed into itself and has
powerful surface gravity
d) A large star which has collapsed into itself and has
no surface gravity
19. What is a Richter scale?
a) It measures vibrations from earthquake
b) It measures vibrations from volcano
c) It measures vibrations from forest fires
d) It measures moment of magma
20. The first telescope was invented by:
a) Dutch, Hans Lippershey
b) Dutch, Newmann
c) Dutch, Huygens
d) Galileo
ANSWERS:
1. c
2. d
3. a
4. a
5. d
6. a
7. d
8. a
9. b
10. a
11. b
12. a
13. a
14. c
15. a 16. d
17. c
18. c
19. a
20. a
Contributed by Ms Banita Rani Singh, 480-A, Pal Link Road,
Jodhpur, Rajasthan