CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Power and Thin Lenses in Contact

Two lenses of...

Question

Two lenses of powers – 15 D and +5D are in constant with each other. The focal length of the combination is

A

– 10 cm

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

B

+ 20 cm

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

C

+ 10 cm

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

D

– 20 cm

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

Open in App

Solution

The correct option is A – 10 cm
Power of a lens combination is P1+P2+........
and power is reciprocal of focal length.
Watch the next video for the solution.

Suggest Corrections

thumbs-up

1

Similar questions

Q. Two lenses of power

25 D

- 15 D

are in contact with each other. Focal length of the combination will be

Q. A convex lens of focal length 10 cm is placed in contact with a concave lens of focal length 20 cm. The focal length of this combination of lenses will be:
(a) +10 cm
(b) +20 cm
(c) −10 cm
(d) −20 cm

Q. Two lenses of powers

+ 15 D

- 5 D

are in contact with each other. What is the focal length of combination?

Q. Two lenses of power

- 15 D

+ 5 D

are in contact with each other. The focal length of the combination is

Q. Two lenses of power

15 D

- 5 D

are in contact. The focal length of combination is

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Power and Thin Lenses in Contact

PHYSICS

Watch in App

explore_more_icon

Explore more

Power and Thin Lenses in Contact

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon