What is the radius of curvature of a plane mirror?

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Solution

Radius of curvature of a plane mirror:
A plane mirror has an infinite radius of curvature.
A plane mirror can be thought of as a component of an infinitely large spherical surface.
The radius of the sphere from which the mirror was cut defines the radius of curvature of the mirror.
As a result, the radius of curvature of a plane mirror is infinitely long.

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