Question

Which of the following is not a required condition for shadow formation?

• A. There must be a source of light.
• B. There must be an opaque body to obstruct the path of light.
• C. There must be an opaque screen to form the shadow.
• D. There must be a transparent body to obstruct the path of light.

Answer 1

The correct option is:D

1. There must be a transparent body to obstruct the path of light.
2. Shadow is formed on a surface only when the light is obstructed by an opaque object.
3. Since, transparent objects allow light to pass through them, they cannot form a shadow.
4. So, having a transparent object is not a required condition for the formation of shadow.