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(D) The focal length of a spherical mirror is determined solely by its radius of curvature $(f = R/2)$.Unlike lenses,where the refractive index depend

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(D) The focal length of a spherical mirror is determined solely by its radius of curvature $(f = R/2)$.Unlike lenses,where the refractive index depends on the wavelength of light (causing chromatic aberration),the reflection of light from a mirror surface is independent of the wavelength or color of the incident light.Therefore,the focal length remains the same for all colors of light.

The focal length of a spherical mirror is .......

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