Question

If a spherical mirror is immersed in a liquid its focal length will

Answer 1

If a spherical mirror is immersed in water its focal length will remain the same because the focal length is not influenced by the surrounding medium as it is the distance between the principal focus and the pole of the mirror.

Answer 2

Answer:

The spherical mirror's property is focal length. As a result, when immersed in liquid, it does not change.

Explanation:

What is focal length-

• The focal length (f) is the distance between the focal point and a lens or mirror ( F ).
• This is the distance between parallel light rays meeting at a lens or mirror.
• A spherical mirror is a mirror with a surface cut out of a spherical shell.
• The focal length of a spherical mirror is the distance between the major focus and its pole.
• The focal length of a spherical mirror is half its radius of curvature, or f = R/2, in the small-angle approximation.

Does focal length of a mirror change in liquid:

• Mirrors, whether spherical or not, work on the concept that the angle at which a ray of light reaches the mirror's surface matches the angle at which it is reflected.
• The medium in which the light travels has no effect on this behaviour, so the focal length of the mirror would be the same in air or water.