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Apparent position of a star

The Sun is vi...

Question

The Sun is visible for 2 minutes after the sunset. Which of the following factors determine the amount of delay?

A

Size of the Earth

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B

Dispersion of sunlight

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C

Thickness of the atmosphere

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Solution

The correct option is C Thickness of the atmosphere

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Q. 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 ................

Q. 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 ___

Q. Atmospheric refraction causes advance sunrise and delayed sunset. By how much time is:
(a) sunrise advanced?
(b) sunset delayed?

Q. Which of the following is not caused by the atmospheric refraction of light?
(a) twinkling of stars at night
(b) sun appearing higher in the sky than it actually is
(c) sun becoming visible two minutes before actual sunrise
(d) sun appearing red at sunset

Q. We can see the sun before it has actually risen above the horizon (advance sunrise) and can see the sun for sometime after it has set below the horizon (delayed sunset), all because of atmospheric refraction.

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Apparent position of a star

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