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Human Eye & The Colourful World - 04
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Mr. Aseet Srivastava, (M.Sc., B.Ed.
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Q.1. The twinkling of stars is due to atmospheric :
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1 point
dispersion of light
reflection of light
interference of light
refraction of light
Q.2. The atmospheric refraction of light causes the twinkling of :
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planets only
stars only
planets and stars
stars and satellites
Q.3. The stars appear higher in the sky than they actually are, due to :
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reflection of light
scattering of light
diffraction of light
refraction of light
Q.4. The stars twinkle but the planets do not twinkle at night because :
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the stars are very large but planets are small
the stars are small but the planets are large
the stars are much nearer but planets are far off
the stars are far off but planets are nearer to earth
Q.5. As light from a far off star comes down towards the earth :
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it bends towards the normal
it does not bend at all
it is reflected back
it bends away from the normal
Q.6. We can see the sun before the actual sunrise by about :
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20 minutes
2 minutes
5 minutes
2 hours
Q.7. Due to atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by about :
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4 minutes
5 minutes
6 minutes
2 minutes
Q.8. The day is longer on the earth by about 4 minutes because :
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the earth has atmosphere
the earth rotates on its axis
the earth revolves around the sun
the earth is round in shape
Q.9. The blue colour of sky is due to :
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refraction of light
scattering of light
diffraction of light
dispersion of light
Q.10. The red colour of the sun at the time of sunrise and sunset is because :
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red colour is most scattered
blue colour is least scattered
red colour is least scattered
blue colour is most scattered
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