1.

For a spherical mirror focal length 'f' and radius of curvature 'R' are correlated as :

Answer»

f = R
f = 2R
`f = (R)/(2)`
`f = (1)/(R)`

Solution :For a spherical mirror FOCAL LENGTH is one of its RADIUS of curvature i.e., `f = (R)/(2) or R = 2f`


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