Question

A fish which is at a depth of 12 cm in $(\mu =\frac{4}{3})$ is viewed by an observer on the bank of lake. Its apparent depth as observed by the observer is:

• A. 3 cm
• B. 9 cm
• C. 12 cm
• D. 16 cm

Answer 1

The correct option is B 9 cm

D= Real depth, d = apparent depth

$\mu =\frac{D}{d}$

$⟹d=\frac{D}{\mu }=\frac{12}{4/3}cm=9cm$