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Q.

Is it true that on a sunny day, a bird or an airplane flying high in the sky cast its shadow on the ground?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false.
The shadow of a bird or an aeroplane flying high in the sky does not fall on the ground because they are at such a high altitude that the ground that serves as a screen for the shadow is far away, and the shadow cannot form in the absence of the screen. Therefore, they can only cast a shadow if they are at a suitable height, i.e. near the ground.
The correct statement would be, a bird or an airplane flying high in the sky cannot cast its shadow.
 
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