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

If a combination of 3 convex lens is arranged in the shown manner the focal length of lens 1 is + 5 cm, lens II is 10 cm and lens III is 20 cm. Calculate the total power of the combination of the lens.


A

– 0.35 D

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

+ 0.1 D

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

+ 0.35 D

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

+ 0.75 D

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

The correct option is C

+ 0.35 D


Total Power = P| + P|| + P||| ; P = 1f
P| = 15 D ; P|| = 110 D ; P||| = 120 D
Total (P) = 15 + 110 + 120 = 720
P = + 0.35 D


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Power of a Lens
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon