question_answer

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.

Answer:

Sometimes the shadow was not obtained due to following reasons?

(i)   The direction of the torch light is not towards screen.

(ii) The screen is away from the ball.

(iii) The torch is kept away from the ball.