Question

Why is a shadow obtained only on a screen?

Answer 1

Answer:

A shadow is a dark region, and is formed only when a light source, an opaque object and a screen are present. Opaque objects form shadows because light is not able to bend around them. Shadows are seen more clearly on light screens. ... The length and shape of a shadow depends on the object by which it is formed.

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Answer 2

Answer:

It is a virtual image formed by when the reflected rays are produced backwards. The rays don't actually meet.

Explanation:

Virtual images can only be obtained on a screen as they are not formed by the actual intersection of the reflected

rays.