Question

What happens to the shadow formed on a screen when
a) the distance between the source of light and the object increases
b) the distance between the object and the screen decreases

Answer 1

Answer:

If the distance between the light source and the object increases by a very large factor, then the shadow may completely disappear as the light rays coming from a very distant point can't make an effect on the object.

Explanation:

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Answer 2

Answer:

If we decrease the distance between the source of light and the object, then the size of the shadow will increase because the amount of light falling on the screen will decrease.