Question

26) Radius of curvature of a mirror is 20cm, its focal length is

a. 4m

b. 40m

c. 0.25m

d. 10m

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Answer 1

Answer:

Radius of curvature (R) = 20cm

Radius of curvature of a spherical mirror = 2- focal length.

R = 2f

F = R/2

F = 20/2

F = 10.

∆ Hence, the focal length is 10cm.

Step-by-step explanation:

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Answer 2

Answer:

The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Therefore, the focal length of the spherical mirror is 10 cm.

Step-by-step explanation:

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