Question

5. Radius of curvature of a spherical mirror is 3cm.its focal length is___ cm
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Answer 1

Answer:

3 cm is a focal length .

this for you my dear

Answer 2

Answer:

the focal length is equal to 1.5 cm.

Explanation:

The radius of curvature of a spherical mirror is equal to 3cm.

The radius of curvature of a spherical mirror is equal to twice the focal length.

By the equation,

$F=\frac{R}{2}$

R denoted for Radius of curvature of a spherical mirror

F denoted for Focal length of a spherical mirror

$F=\frac{R}{2}$

$F=\frac{3}{2} \\F=1.5cm$

So, the focal length of the spherical mirror is 1.5 cm.