Question

focus length of a convex mirror whose radious of curvature 40 cm is​

Answer 1

Answer:

given

radius of curvature =40cm

As focal length is half of the radius of curvature,

focal length=40/2 cm =20cm.

Answer 2

Answer:

Below is the answer.

Explanation:

We have to find the focal length of a convex mirror whose radius of curvature is 40 cm. To do so we apply the formula as:

Radius of curvature R = 40 cm

Radius of curvature = 2 x focal length (f)

R = 2 f

so,

f = R/2

By placing values we get,

f = 40/2

f = 20

20 is the focal length of a convex mirror.