radius of curvature of a convex mirror is 28 cm. find its focal length.
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CONCEPT:
Focal length (f): The distance between the centre of the mirror and the focal point (where parallel rays of light meet or appear to meet) of the mirror is called the focal length.
The radius of curvature (R): The distance between the centre of the lens or mirror to the vertex which is located on the local optical axis is called the Radius of Curvature.
The focal length is half of the radius of curvature.
f = R/2
CALCULATION:
Given that:
Radius of curvature (R) = 28 cm,
The focal length (f) = R/2 = 28/2 = 14 cm
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