Ray Optics

JEE Main level, single correct, medium

41 of 295

Question 41 of 295

The focal length ff is related to the radius of curvature rr of the spherical convex mirror by:

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Answer: (B) f=+12rf=+\dfrac{1}{2}r

For convex mirror, focus is behind the mirror.

As we can see from the figure that,
⇒f=+r2\Rightarrow f=+\dfrac{r}{2}

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JEE Main 2025 Apr 2 Shift 1 question paper

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