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The focal length f is related to the radius of curvature r of the spherical convex mirror by:

a. f = r

b. f = +½ r

c. f = -½ r

d. f = – r

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The correct Answer is B) f = +½ r  

Explaination :

f = +½ r 

So, r / 2 = f

f = +½ r 

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