Question

A shadow cannot be formed if the light rays fall on ___.

• A. an iron surface
• B. an unpolished wooden surface
• C. a polished wooden surface
• D. a transparent glass surface
  

Answer 1

The correct option is D a transparent glass surface


Iron, unpolished wood and polished wood, all are opaque objects.
So they do not allow light to pass through them, and shadow is formed on the other side.
In case of a transparent glass, light will pass through it without any obstruction. So it will not form a shadow.