Define focal length of a spherical mirror.

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Solution

The distance from the principal focus to its pole or vertex is said to be the focal length of the spherical mirror.
Focal length is the property of a spherical mirror. It doesn't depend on the light used. It is the same for all light.

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Define focal length of a spherical mirror.

The distance from the principal focus to its pole or vertex is said to be the focal length of the spherical mirror.Focal length is the property of a spherical mirror. It doesn't depend on the light used. It is the same for all light.

The distance from the principal focus to its pole or vertex is said to be the focal length of the spherical mirror.
Focal length is the property of a spherical mirror. It doesn't depend on the light used. It is the same for all light.