The focal length of a convex mirror whose radius of curvature is 28 cm is ____
A. 14 cm
B. 7 cm
C. 56 cm
D. 21 cm
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Answer:
14 cm is the correct answer
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the focal length of the convex mirror is equal to half of the radius of curvature of that mirror.
the radius of curvature, R=28
radius of curvature=2-focal length (f)
R=2f
f=R/2=28/2=14
hence, the focal length of mirror is 14cm
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