Question

Observe the figure given below:

When the torch is lit as shown, which of the following should be the object A to get the patch of light at B?

• A. A sheet of white paper
• B. A wooden board
• C. A glass sheet
• D. A plane mirror

Answer 1

The correct option is D A plane mirror

• A wooden board is an opaque object but has no reflective surface, i.e. most of the light will be absorbed by the surface or will be reflected in any direction.
• A glass sheet is a transparent object hence, all the light will pass through it, rather than getting reflected from it.
• White paper is a translucent object, i.e. it allows light to partially pass through it, and the remaining light will be reflected in different directions.
• A mirror is an opaque object and has a reflective surface, hence, it reflects almost all the light that hits it. Therefore, mirror is the correct answer.