CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a

A
Convex mirror of focal length 10 cm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Concave mirror of focal length 40 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Concave mirror of focal length 60 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Concave mirror of focal length 10 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Convex mirror of focal length 10 cm
By using 1F=2f1+1fm
Since fm=F=fl2=202=10cm
(After silvering concave lens behave as convex mirror)

flag
Suggest Corrections
thumbs-up
17
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Lens Formula, Magnification and Power of Lens
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon