The focal length f is equal to the half of the radius of the curvature R of a spherical mirror. Introduction: A spherical mirror seems to be a section of a sphere. All the rays parallel to the axis reflected back to a point called focal point.

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Chapter 34, Problem 78EAP

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To show: The focal length f is equal to the half of the radius of the curvature R of a spherical mirror.

Introduction: A spherical mirror seems to be a section of a sphere. All the rays parallel to the axis reflected back to a point called focal point.

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