Multiple choice

A person is moving towards a plane mirror with speed of 1m/s. The image will approach the moving person with relative speed of ______.

  1. 0.5 m/s

  2. 1.0 m/s

  3. 2.0 m/s

  4. 3.5 m/s
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a plane mirror, the image distance equals the object distance from the mirror surface. When you move 1 m/s toward the mirror, your image also moves 1 m/s toward you from the opposite side. The relative speed between you and your approaching image is therefore 1 m/s (not 2 m/s).

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