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The relation between focal length f and radius of curvature R for a spherical mirror is__?

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f = 2 R

f = \frac{R}{2}

f = \frac{R}{4}

f = \frac{2}{R}

answer is B.

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Detailed Solution

The relation between focal length

(f)

and radius of curvature

(R)

for a spherical mirror is

f = \frac{R}{2}

The reflecting surface of a spherical mirror may be inwards or outwards. The focal length

(f)

is defined as the distance between the focus and the pole of the mirror. The radius of curvature

(R)

is defined as the radius of the mirror, which forms a complete circle. The focal length

(f)

of a spherical mirror is half the radius of curvature

(R)

of that spherical mirror.

f = \frac{R}{2}

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