Question

A fish in a lake is at a 6.3 m distance from the edge of the lake. If it is just able to see a tree on the edge of the lake, its depth in the lake is _______ m. Refractive index of the water is 1.33

Answer 1

5.52 is the answer

Hope you understand

Answer 2

Thus the depth of the lake is 5.55 m

Explanation:

Refractive index of water = 1.33

θ = sin^-1 ( 1 / μ)

sin^-1 ( 3/4) = 48.54

tan ( 90° - C) = h / 6.3

cot C = h / 6.3

0.8819 = h / 6.3

h = 0.8819 x 6.3

h = 5.55 m

Thus the depth of the lake is 5.55 m