The apparent position of the stars is always _________.

fluctuating

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same

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predictable

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increasing

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Solution

The correct option is A fluctuating
The twinkling of a star is due to atmospheric refraction of starlight as starlight undergoes continuous refraction before it reaches the earth. Since the atmosphere bends the starlight towards normal, the apparent position of the star appears to be slightly different from its actual position. This apparent position of the star is hence not constant and predictable and keeps fluctuating.

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Similar questions

Why is the actual position of a star different from the apparent position?

Which of the following points can be attributed as a reason for deviation of apparent position of a star from its actual position?

A

100

B

m_{B} - m_{A}

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