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

Question

The focal length f is related to the radius of curvature r of the spherical convex mirror by: (A) f =+(1/2) r (B) f =- r (C) f =-(1/2) r (D) f = r

Tardigrade Admin · Accepted Answer

For convex mirror, focus is behind the mirror, <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/35adb18bc5d2897623dea482743a6925-.png" /> ⇒ f = + (r/2)

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

$f = + \frac{1}{2} r$

$f = - r$

$f = - \frac{1}{2} r$

$f = r$

For convex mirror, focus is behind the mirror,

$\Rightarrow f = + \frac{r}{2}$

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

f=+21​r

f=−r

f=−21​r

f=r

For convex mirror, focus is behind the mirror, ⇒f=+2r​