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 $
