CameraIcon

SearchIcon

MyQuestionIcon

1

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

Power and Thin Lenses in Contact

A converging ...

Question

A converging and a diverging lens of focal lengths are placed coaxially in contact .find the power and focal length of combination

Open in App

Solution

Let the focal length of both the lenses be f.
Focal length of the combinationis F given by
1/F = (1/f)+(1/-f) = 0
or, F is infinity.

Since focal length is infinity then power will be zero

Suggest Corrections

thumbs-up

6

Similar questions

Q. A convex lens of focal length

30 c m

is placed coaxially in contact with a concave lens of focal length

40 c m

. Determine the power of the combination. Will the system be converging or diverging in nature?

Q. A lens of power

+ 2.0 D

is placed in contact with another of power

- 1.0 D

. The combination will behave like

Q. A converging lens of focal length

40

cm is kept in contact with a diverging lens of focal length

30

cm. Find the focal length of the combination.

Q. A thin converging lens of focal length

25

cm is kept in contact with a thin diverging lens of focal length

20

cm. Focal length of the combination is:-

Q. A converging lens of focal length

20 c m

and a diverging lens of focal length

5 c m

are placed coaxially at

d

distance apart. If a parallel ray of light is incident on the converging lens and it emerges out of the diverging lens as a parallel ray, then the value of

d

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