Question

A fish in water (refractive index $n$) looks at a bird vertically above in the air. If $y$ is the height of the bird and $x$ is the depth of the fish from the surface, then the distance of the bird as estimated by the fish is

• A. $x+y(1-\frac{1}{n})$
• B. $x+ny$
• C. $x+y(1+\frac{1}{n})$
• D. $y+x(1-\frac{1}{n})$

Answer 1

Answer: (B)

$x+ny$

Apparent height from surface =$ny$

total distance=$x+ny$