Question

if radius of curvature of convex mirror is 30cm what would be its focal length

Answer 1

hey mate ○●○●○●○

focal length = 1/2 × radius of curvature
then,
r = 30 cm

f = 1/2×30

f = 15 cm .

hope it may help u.
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Answer 2

Answer:

The image formed will be at focus and the focal length is 15cm.

Explanation:

Focal length:

The focal length of the lens is the distance between the lens and the image sensor when the subject is in focus.

Image formed:

An object is placed at a large distance in front of convex mirror means the object is at infinity. When the object is at infinity then the image is formed at focus.

Also radius of curvature is equal to the twice of focal length.

                       R = 2f

So, to find the distance of image formed it is enough to find the focal length.

             Given Radius of curvature R = 30cm

                 then     f = R/2

                              f = 30/2

                            f = 15cm

    Hence the image is formed at focus and the focal length is 15cm.

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