If the focal length of a spherical mirror is $12.5 c m$ . Its radius of curvature will be

25 c m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

15 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

20 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

35 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $25 c m$
We know,
$F o c a l l e n g t h (f) = \frac{R a d i u s o f c u r v a t u r e (R)}{2}$

$\Rightarrow R a d i u s o f c u r v a t u r e (R) = 2 \times F o c a l l e n g t h (f)$

Given,
Focal Length, $f = 12.5 c m$
$\Rightarrow R = 2 \times f = 2 \times 12.5 = 25 c m$
$\Rightarrow R a d i u s o f c u r v a t u r e (R) = 25 c m$

Hence, the correct answer is OPTION A.

Suggest Corrections

Similar questions

If the focal length of a spherical mirror is 12.5 cm, its radius of curvature will be : (a) 25 cm (b) 15 cm (c) 20 cm (d) 35 cm

The focal length of a spherical mirror of radius of curvature 30 cm is : (a) 10 cm (b) 15 cm (c) 20 cm (d) 30 cm

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror) ? Calculate the focal length of a spherical mirror whose radius of curvature is 25 cm.

Join BYJU'S Learning Program

If the focal length of a spherical mirror is 12.5cm. Its radius of curvature will be

The correct option is A 25cmWe know,Focal length (f)=Radius of curvature (R)2⇒Radius of curvature (R)=2×Focal length (f)Given, Focal Length, f=12.5 cm⇒R=2×f=2×12.5=25 cm⇒Radius of curvature (R)=25 cmHence, the correct answer is OPTION A.

If the focal length of a spherical mirror is $12.5 c m$ . Its radius of curvature will be