Question

cover the face of torch with a transparent coloured paper.send its beam through an opaque object.what do you observe

Answer 1

If the face of torch is covered with transparent colored paper and the beam sent through an opaque object, the opaque object since does not reflect light will only observe a kind of dark shadow behind the object,

Thus, a shadow is formed when light is made to pass through it.

Answer 2

Light doesn't pass through an opaque

object

Hence

A shadow is formed when light pass throw it