Optics Question 522

Question: A man is 180cm tall and his eyes are 10cm below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of 1m from him. The minimum length of the plane mirror required is

[MP PMT 1993; DPMT 2001]

Options:

A) 180cm

B) 90cm

C) 85cm

D) 170cm

Show Answer

Answer:

Correct Answer: B

Solution:

According to the following ray diagram length of mirror =12(10+170)=90cm



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