Question

Calculate the magnitude of the focal length and power of a spherical mirror that has a radius of 5.00 cm.

Answer 1

2.5 cm

40 D

Step-by-step explanation:

When the radius of curvature of a lens is divided by 2 we get the focal length of the lens.

Focal length is given by

`f=(R)/(2)\\\Rightarrow f=(5)/(2)\\\Rightarrow f=2.5\ cm`

The focal length of the lens is 2.5 cm

When we divide 1 by the focal length in the unit of meters we get the power of a lens

Power of a lens is given by

`P=(1)/(f)\\\Rightarrow P=(1)/(0.025)\\\Rightarrow P=40\ D`

The power of the lens is 40 D