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Q.

[9]

Is it true that stars appear to twinkle at night due to atmospheric refraction?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
The stars twinkle at night. This is due to the intensity of starlight reaching our eyes increasing and decreasing continuously due to atmospheric refraction. When the starlight reaches our eyes increases, the stars look bright; when the starlight reaches our eyes decreases, they appear dim. This is known as the sparkling effect.
 
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