The focal length of a given mirror is half of the radius of curvature of the same mirror.
f = r/2
f = 20/2
f = 10 cm
Hence, The focal length of the given mirror is 10 cm.
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The focal length of a given mirror is half of the radius of curvature of the same mirror.
f = r/2
f = 20/2
f = 10 cm
Hence, The focal length of the given mirror is 10 cm.
pls mark as brainliest