Calculate the focal length of the mirror of radius of curvature of 20 cm
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Yea leamme tell!
Explanation: ans=40 Becoz centre of curvature is twice or double of focal length (f) f=R/2
R=RADIUS OF CURVATURE OF THE MIRROR
F=FOCAL LENGTH=20
F=20=R/2
R=2*F=2*20=40
ANSEWR=40
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