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How does atmospheric refraction affect t...

How does atmospheric refraction affect the duration of the day on the earth?

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It advances sunrise by 2 minutes and delays the sunset by 2 minutes. Hence, it increases the length of the day by 4 minutes.
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ZEN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-ZEN ADDITIONAL QUESTIONS SECTION - VERY SHORT ANSWER TYPE QUESTIONS
  1. What is the reason for atmospheric refraction ?

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  2. On what factor does the colour of the scattered light depend ?

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  3. How does atmospheric refraction affect the duration of the day on the ...

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  4. What is the cause of random wavering or flickering of the objects near...

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  5. Name any two phenomena which arise due to scattering of light in the e...

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  6. What would have been the colour of the sky, in the absence of atmosphe...

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  7. Why are the traffic light-signals [or danger signals] of red colour ?

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  8. What is cornea ?

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  9. Mention the function of eye lens.

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  10. Where does refraction of light rays occur in the human eye ?

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  11. Mention the role of iris in the human eye.

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  12. Which are the light-sensitive cells present in the retina of the human...

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  13. Which nerves carry electrical signals from the light-sensitive cells o...

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  14. Which are the light-sensitive cells present in the retina of the human...

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  15. What is iris?

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  16. Which part of the eye generates electric signals ?

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  17. What is blind spot ?

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  18. What is the function of pupil of the human eye ?

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  19. Which muscles help in changing the shape of the eye lens ?

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  20. State one point of similarity between the image formed by the human ey...

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