calculate the radius curvature of a convex mirror of focal length 13 cm
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we know that R - 2f
R = 2(13)
R= 26
therefore the radius of curvature of a convex mirror is +26 cm
note - focal length of convex mirror is +ve and focal length of concave mirror is -ve and same with lens
focal length of convex lens is +ve and focal length of concave lens is -ve
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