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A fish which is at a depth of 12cm in wa...

A fish which is at a depth of 12cm in water `(mu=4/3)` is viewed by an observer on the bank of a lake. Its apparent depth as observed by the observer is …..cm.

A

3

B

9

C

12

D

16

Text Solution

Verified by Experts

The correct Answer is:
B
When image formed in denser medium is observed from rarer medium.
imaginary depth= `(real depth)/n`
(where n= refractive index of denser medium with respect to rarer medium)
`therefore d_1=d_r/n=12/((4/3))=36/4=9cm`
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