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प्रश्न
Is the position of a star as seen by us its true position? Justify your answer.
उत्तर
No, the light of stars enters the earth’s atmosphere and undergoes refraction continuously before reaching the earth. The atmospheric refraction takes place under a gradually changing refractive index. Since, starlight bends towards the normal; the apparent position of the star is slightly different from its actual position.
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संबंधित प्रश्न
Give the meaning of the term VIBGYOR. With which phenomenon is it connected?
Which phenomenon makes us see the sun:
a few minutes after actual sunset?
Name the phenomenon due to which the stars seem higher in the sky than they actually are.
Explain why, the sun can be seen about two minutes before actual sunrise. Draw a diagram to Illustrate your answer.
Explain why, if we look at objects through the hot air over a fire, the objects appear to be moving (or shaking) slightly.
Why does the sky appear dark (or black) to an astronaut instead of blue?
Explain in brief the reason for the following :
Delayed sunset
Which phenomenon is responsible for making the path of light visible?
Draw a labeled diagram to show
(i) the reddish appearance of the sun at the sunrise or the sunset and
(ii) white appearance of the sun at noon when it is overhead.
The colour of clear sky from the earth appears blue but from the space it appears black. Why?
