Question

Select the necessary conditions for shadow formation: *
1. An opaque object.
2. Source of unidirectional light.
3. Surface on which shadow to be formed.
4.Only options 2 and 3 are necessary.​

Answer 1

Answer:

4. Only option 2 and 3 are necessary

Answer 2

Answer:

(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.