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 $ =\frac{1}{2}(10+170)=90cm $



NCERT Chapter Video Solution

Dual Pane