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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?


  1. A

  2. B

  3. C

  4. D


Solution

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.

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