JEE Main 2021 · 24 Feb · Shift 1 · Physics Q19

PhysicsSingle correct+4 / -1Question 19 of 90

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

f = r

f = −r

f=-\dfrac12r

f=+\dfrac12r

Answer and worked solution

Official answer: D

Mirror. $f=\frac r2$ , positive for a convex mirror in the usual convention where its focus lies behind it.

(D)

Topics:Spherical mirrors

JEE Main 2021 · 24 Feb · Shift 1, Physics question 19