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Name some everyday objects : (a) which...

Name some everyday objects :
(a) which reflect all the colours in sunlight
(b) which absorb all the colours in sunlight

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The correct Answer is:
(a) White paper (b) Blackboard
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LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Exercise
  1. Which colour of the light has the longest wavelength?

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  2. Why do you not see a spectrum of colours when light passes through a f...

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  3. Name some everyday objects : (a) which reflect all the colours in su...

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  4. Where in nature can you find evidence that white sunlight may be made ...

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  5. Name the phenomenon which causes the twinkling of stars.

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  6. Name two effects produced by the atmospheric refraction.

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  7. Which phenomenon makes us see the sun : (a) a few minutes before act...

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  8. State whether the following statement is true or false : The planet ...

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

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

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

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

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

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  14. The twinkling of stars is due to atmospheric :

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

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

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

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

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

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

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