Question

A fish seems to be at a depth of 75cm from the surface. What is the actual distance from the surface? (Refractive index of water is 1.33).

Answer 1

refractive index= real depth÷apparent depth
1.33=75÷apparent depth
apparent depth=75÷1.33=56.3909cm=56.34cm

Answer 2

Answer:

Refractive index= real depth ÷apparent depth

1.33=75÷apparent depth

Apparent depth=75÷1.33=56.3909cm

                          =56.34cm