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Fill in the following blanks with suitable words :
We can see the sun about………..minutes before the actual sunrise and about……..minutes after the actual sunset because of atmospheric……….

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The correct Answer is:
two ; two ; refraction
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LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Exercise
  1. State whether the following statement is true or false : The planet ...

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  2. Name the phenomenon due to which the stars seem higher in the sky than...

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  3. Fill in the following blanks with suitable words : We can see the su...

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  4. Why do stars seem higher than they actually are ? Illustrate your answ...

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  5. Explain why, the sun can be seen about two minutes before actual sunri...

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  6. Explain why, if we look at objects through the hot air over a fire, th...

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  7. The twinkling of stars is due to atmospheric :

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  8. The atmospheric refraction of light causes the twinkling of :

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  9. The stars appear higher in the sky than they actually are, due to :

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  10. As light from a far off star comes down towards the earth :

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

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

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

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

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

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

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

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

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

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

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