JEE PYQ: Ray Optics Question 8
Question 8 - 2021 (24 Feb Shift 1)
The focal length $f$ is related to the radius of curvature $r$ of the spherical convex mirror by -
(1) $f = r$
(2) $f = -\frac{1}{2}r$
(3) $f = +\frac{1}{2}r$
(4) $f = -r$
Show Answer
Answer: (3)
Solution
So, $\frac{R}{2} = f$ $F = +\frac{1}{2}R$