Solve

Guides

0

You visited us 0 times! Enjoying our articles? Unlock Full Access!

Question

A convex lens of focal length 10 cm is combined with a concave lens of focal length 20 cm to form an achromatic combination. The convex lens is made of a material of dispersive power 0.016. The dispersive power of the material used for concave lens is
0.022
0.042
0.032
0.052

A

0.042

B

0.032

C

0.052

D

0.022

Open in App

Solution

Verified by Toppr

Was this answer helpful?

1

Similar Questions

Q1

A convex lens of focal length

5 cm

is used in the combination with a concave lens of unknown focal length to form an achromatic combination. If the dispersive powers of the lenses are in the ratio

2 : 3

respectively. Then the value of focal length of concave lens will be :

View Solution

Q2

The focal length of a lens of dispersive power

0.45

which should be placed in contact with a convex lens of focal length

84 cm

and dispersive power

0.21

to make the achromatic combination from the two lenses (in cm) is

View Solution

Q3

lenses applied in a achromatic combination having dispersive power in ratio of 5.3 if focal length of concave lens is 15cm then focal length of other lens will be

View Solution

Q4

A CONCAVE LENS IS KEPT IN CONTACT WITH A CONVEX LENS OF FOCAL LENGTH 20 cm THE COMBINATION WORKS AS A CONVERGING LENS OF FOCAL LENGTH 100 cm CALCULATE POWER OF CONCAVE LENS.

View Solution

Q5

A convex lens of focal length 40 cm is an contact with a concave lens of focal length 25 cm. The power of combination is

View Solution