If a lens is immersed in water, its focal length changes. Part A If a spherical

Question

If a lens is immersed in water, its focal length changes.

Part A

If a spherical mirror is immersed in water, does its focal length increase, decrease, or stay the same?

Part B

Choose the best explanation from among the following:

A.)The focal length stays the same because it depends on the fact that the angle of incidence is equal to the angle of reflection for a mirror. This is unaffected by the presence of the water.

B.)Water will refract the light. This, combined with the reflection due to the mirror, will result in a decreased focal length.

C.)The focal length will increase because the water will cause more bending of light.

Explanation / Answer

PartA.

Focal length stays the same for spherical lens .

Part B

(A) the focal length stays the same because it depends on the fact that the angle of incidence is equal to the angle of reflection for a mirror .this is unaffacted by the presence of water.

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