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Due to atmospheric refraction of sunligh...

Due to atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by about :

A

6 minutes

B

2 minutes

C

4 minutes

D

5 minutes

Text Solution

Verified by Experts

The correct Answer is:
C
NA
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LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Exercise
  1. As light from a far off star comes down towards the earth :

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  2. We can see the sun before the actual sunrise by about :

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  3. Due to atmospheric refraction of sunlight, the time from sunrise to su...

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  4. The day is longer on the earth by about 4 minutes because :

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  5. We know that light refracts (or bends) when it goes from one medium to...

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  6. By how much time day would have been shorter if the earth had no atmos...

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  7. Which of the two is scattered more easily : light of shorter wavelengt...

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  8. What colour does the sky appear to an astronaut ?

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  9. What happens when a beam of sunlight enters a dusty room through a win...

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  10. Why does the sky appear blue on a clear day ?

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  11. Why does the sky appear dark (or black) to an astronaut instead of blu...

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  12. Why does the sun appear red at sunrise ?

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  13. Why does the sun appear red at sunset ?

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  14. Why are the 'danger signal' lights red in colour ?

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  15. The blue colour of sky is due to :

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  16. The red colour of the sun at the time of sunrise and sunset is because...

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  17. Which of the following is not caused by the atmospheric refraction of ...

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  18. The sky appears blue because some of the blue component of sunlight is...

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  19. Sunset is red because at that time the light coming from the sun has t...

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  20. Explain why, when the sun is overhead at noon, it appears white, but w...

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