Q.

Is it true that even after sunset, dusk remains for some more time?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
At dusk, when the sun has set, even after that, for 2  min, sunlight is seen on earth. This is due to the scattering of light. The atmospheric particles scatter the light rays, due to which sunlight can be seen even after sunset. This happens till the sun goes  180 degrees below the horizon. Hence even after the sun is set, dusk remains for some more time.
 
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