Optics Question 760
Question: An underwater swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be at a distance from the surface of water equal to (Refractive Index of water is 4/3)
[KCET (Engg.) 2001]
Options:
A) 24 m
B) 12 m
C) 18 m
D) 9 m
Show Answer
Answer:
Correct Answer: A
Solution:
$ \mu =\frac{h’}{h}\Rightarrow h’=\mu h=\frac{4}{3}\times 18=24cm $
