Concave mirror have radius of curvature $40 c m$ . At what distance from a pole of a mirror accelerated beam of light would be focus after reflection?

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Solution

When the rays coming from infinity strikes the mirror it will be reflected back passing throught the focus.

The relation between radius of curvature and the focal length is given as

$R = 2 f$

$f = \frac{40}{2}$

The focal length is $20 c m$

Hence parallel beam of light will be focused at focal length.

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Concave mirror have radius of curvature 40cm . At what distance from a pole of a mirror accelerated beam of light would be focus after reflection?

When the rays coming from infinity strikes the mirror it will be reflected back passing throught the focus. The relation between radius of curvature and the focal length is given as R=2f f=402 The focal length is 20cm Hence parallel beam of light will be focused at focal length.

Concave mirror have radius of curvature $40 c m$ . At what distance from a pole of a mirror accelerated beam of light would be focus after reflection?