Question

If the radious of curvature of a lens is 30 cm then what is it's focal length.​

Answer 1

Answer:

Hence, the focal length of the given convex mirror is 16 cm.

Answer 2

radius of curvature of a lens is 30 cm

$formula. \: \\ f = \frac{r}{2}$

let , radius of curvature = r

focal length = f

then ,

$f = \frac{r}{2} \\ = > f = \frac{30}{2} \\ = > f = 15 \: cm$

so the focal length of the lens = 15 cm