Question

The focal length of a convex mirror is 15cm . find its radius of curvature.​

Answer 1

f=15cm then,

f=R/2✔

15=R/2

2 (15)=R

30=R✔✔

therefore radius of curvature =30 cm✔

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Answer 2

Radius of curvature= 2×focal length

Focal length is 15cm so,

Radius of curvature= 2×15

=30cm

Radius of curvature=30cm