Answer to Question #263649 in Optics for Rethabile

Question

Question 21 

An under-water swimmer cannot see very clearly even in absolutely clear water because of

Question 21 options:

A) 

Scattering of light in water

B) 

No option is correct

C) 

Reduction of speed of light in water

D) 

Change in the focal length of eye lens

E) 

Absorption of light in water

Answer 1

The eye lens is surrounded by a different medium than air. This will change the focal length of the eyes lens. The eye cannot accommodate all images as it would do in air.

Answer: D) change in the focal length of eye lens