wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If the radius of curvature of a spherical mirror is 20 cm, then its focal length is _______ cm.


A
20
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
40
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
10
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
None of these
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 10
Radius of curvature = 2 x focal length.
So, focal length = 12× radius of curvature = 12×20 cm = 10 cm

flag
Suggest Corrections
thumbs-up
2
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Apparent Depth
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon