Target Exam

CUET

Subject

Physics

Chapter

Ray Optics

Question:

Choose the correct relation between focal length f and radius of curvature R of a convex mirror from the following:

Options:

$f = +R$

$ f = -R$

$f = -0.5 R$

$f = +0.5 R$

Correct Answer:

$f = +0.5 R$

Explanation:

The correct answer is Option (4) → $f = +0.5 R$

For a convex mirror, the focal length $f$ and radius of curvature $R$ are related by:

$f = +\frac{R}{2}$