Question

A yellow source of light is placed in front of three cardboards having openings A, B, C and D, where A, C, D are collinear as shown below.

From which of the openings will the light source be visible?

• A. A
• B. B
• C. C
• D. D

Answer 1

Answer: (A), (C), (D)

The correct options are
A

A

C

C

D

D

Light travels in straight lines. Hence, the light source will be visible from openings A, C and D.