SAT Subject Physics Practice Question 370: Answer and Explanation

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Question: 370

66. A person standing 1.5 m in front of a plane flat mirror would see their image at a distance of

A. .75 m
B. 1.5 m
C. 2.25 m
D. 3 m
E. 6 m

Correct Answer: D


The correct answer is (D). The image in a plane mirror appears as far into the mirror as the object is in front of the mirror.The image is 1.5 m into the mirror, and the object is 1.5 m in front of the mirror, which is a total of 3 m from the object.

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