Question

give a reason why the shadow is formed on the screen ?

Answer 1

Shadows are formed because light rays travels in a straight line, and they cannot bend round the corners of the objects. The shape of the shadow is also the same as the shape of the object because light travels in a straight line path.

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Answer 2

Answer:

SHADOW is a dark thing which needs light source, opaque object and a screen to be formed.So if there is no following objects it won't be formed.So there should be a screen to form shadow.