The focal length of a spherical mirror is ____ its radius of curvature.

half

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twice

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thrice

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equal to

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Solution

The correct option is A half
Focal length of spherical mirror is half the radius of curvature i.e $f = \frac{R}{2}$

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The focal length of a spherical mirror is ____ its radius of curvature.

The correct option is A halfFocal length of spherical mirror is half the radius of curvature i.e f=R2

The correct option is A half
Focal length of spherical mirror is half the radius of curvature i.e $f = \frac{R}{2}$