Question

can we change the focal length of concave mirror with out changing its length and breadth

Answer 1

Answer:

Explanation:

No, we cannot change the focal length of a concave mirror, it is oy in the case of convex lens when placed in water.

Answer 2

We can not change the focal length of concave mirror with out changing its length and breadth

Explanation:

For spherical mirror,

The focal length does not change of the mirror. Because the focal length of the mirror depends only radius of curvature of the mirror.

The focal length does not depend on the medium, material of the mirror.

The focal length is always change when the mirror bent.

The length and breath does not change as it only bent.

So,

No, we can not change the focal length of concave mirror with out changing its length and breadth

Hence, We can not change the focal length of concave mirror with out changing its length and breadth

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Topic : optics

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