A student had a ball, a screen and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes the shadow was not obtained. Explain.

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An accurate shadow of any object can be formed only when the object, source of light, and the screen must be in a single straight line. So, for obtaining the shadow of the ball, the ball, torch, and the screen must be in a single line. If the shadow is not obtained then there must be some of the reasons as below:

$(i)$. Maybe the screen is far away from the ball.

$(ii)$. The beam of the light from the torch may be falling parallel to the screen on the ball.

$(iii)$. Maybe the torch is far away from the ball.
Updated on 10-Oct-2022 13:30:33