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Question

Planets do not twinkle because they are closer to Earth, and the light coming from each point source

A
averages to zero
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B
doubles
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C
becomes half
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Solution

The correct option is A averages to zero
As planets are closer to us, they appear much bigger and the light seems to come from more than one point.

The dimming of some of the points is nullified by the brightening effect of light coming from other points. Therefore, planets do not seem to twinkle.

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