Question

necessary conditions to be able to see the shadow

Answer 1

(1) There should be an opaque material.

(2) There should be a source of light and screen.

The object must be placed in the path of light. Then shadow is formed on the screen.

Answer 2

Answer:

1. source of light

2. an opaque object to block the way of light

3. a blank sheet or surface to see the shadow