Question

The radius of curvature of a spherical mirror is 20 cm. what is its focal length?​

Answer 1

Answer:

10 cm

Explanation:

f=R/2

f=20/2

f=10 cm

Answer 2

Answer:

Radius of curvature = 2 x focal length.

So, focal length =

2

1

× radius of curvature =

2

1

×20 cm = 10 cm

Explanation:

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