Optics Question 524
Question: When a plane mirror is placed horizontally on a level ground at a distance of $ 60m $ from the foot of a tower, the top of the tower and its image in the mirror subtend an angle of $ 90{}^\circ $ at the eye. The height of the tower will be
[CPMT 1984]
Options:
A) $ 30m $
B) $ 60m $
C) $ 90m $
D) $ 120m $
Show Answer
Answer:
Correct Answer: B
Solution:
$ \tan 45{}^\circ =\frac{h}{60} $
$ \Rightarrow h=60m $
