Home
Class 12
PHYSICS
Four lenses of focal length +15 cm , +20...

Four lenses of focal length `+15 cm , +20 cm, +150 cm` and `+250cm` are available for making an astronomical telescope. To produce the largest magnification, the focal length of the eye-piece should be

A

` + 15 cm`

B

` + 20 cm`

C

`+ 150 cm`

D

` +250 cm`

Text Solution

Verified by Experts

The correct Answer is:
A
`m=f_(0)/(f_(e))` and `L=f_(0)+f_(e)`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE- 3|33 Videos

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE- 4|18 Videos

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE-2 (H.W)(OPTICAL INSTRUMENTS ( MICROSCOPES ))|5 Videos

  • NUCLEI

    NARAYNA|Exercise ASSERTION & REASON|5 Videos

  • SEMI CONDUCTOR DEVICES

    NARAYNA|Exercise Level-II (H.W)|36 Videos

Similar Questions

Explore conceptually related problems

An astronomical telescope of ten-fold angular magnification has a length of 44 cm . The focal length of the objective is

A telescope has magnification 5 and length of tube 60cm then the focal length of eye piece is–

An astronomical telescope if ten -fold angular magnification has a length of 44 cm. The focal length of the objective is