Home
Class 12
PHYSICS
Two lenses have focal lengths f(1) and f...

Two lenses have focal lengths `f_(1)` and `f_(2)` and their dispersive powers are `omega_(1)` and `omega_(2)` respectively. They will together form an achromatic combination if

A

`omega_(1)=2omega_(2) and f_(1)=2f_(2)`

B

`2omega_(1)=omega_(2) and f_(1)=2f_(2)`

C

`omega_(1)=2omega_(2) and f_(1)=-2f_(2)`

D

`2omega_(1)=omega_(2) and 2f_(1)=f_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
(c ) Coordinate of achromatic combination is satisfied, if
`omega_(1)/(f_(1))+omega_(2)/(f_(2))=0`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    DC PANDEY|Exercise Exercise|171 Videos

  • RAY OPTICS

    DC PANDEY|Exercise medical entrance special format question|25 Videos

  • RAY OPTICS

    DC PANDEY|Exercise Checkpoint 9.6|20 Videos

  • NUCLEI

    DC PANDEY|Exercise C MADICAL ENTRANCES GALLERY|46 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Subjective|9 Videos

Similar Questions

Explore conceptually related problems

Focal length of two lens are f and f^(') ans dispersive powers are omega_(0) and 2omega_(0) .To form achromatic combination from these- (1) f^(')=2f ,(2) f^(')=-2f (3) f^(')=-f//2

Focal lengths of two lenses are f and f' and dispersive powers of their materials are omega and omega' . To form achromatic combination from these, which relation is correct ?

Two thin lenses of focal length f_(1) and f_(2) are in contact and coaxial. The power of the combination is

Two thin convex lenses of focal lengths f_(1) and f_(2) are in contact and coaxial. The power of the combination is

Two thin lenses of focal lengths f_(1) and f_(2) are in contact. The focal length of this combination is

An achromatic doublet is formed by combining two lenses.if the focal length of the lenses and their dispersive powers are f,f^(') and omega omega^(') respectively then