Question

The radius of the curvature of a spherical mirror is 20cm. What is it’s focal length

Answer 1

Answer:

by the formula, we know that,

f = R /2

so, putting values we get,

f = 20 /2

f = 10 cm.

focal length is in positive so the mirror is, Convex.

Explanation:

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Answer 2

Answer:

Focal length is equal to 10cm