Home
Class 12
PHYSICS
In an astronomical telescope of refracti...

In an astronomical telescope of refracting type:

A

Eyepiece has greater focal length.

B

Objective has greater focal length.

C

Objective and eyepiece have equal focal length.

D

Eyepiece has greater aperture than the objective.

Text Solution

Verified by Experts

The correct Answer is:
B
Objective has greater focal length.
Promotional Banner

Similar Questions

Explore conceptually related problems

With regard to an astronomical telescope of refracting type, state how you will increase its Magnifiying power.

With regard to an astronomical telescope of refracting type, state how you will increase its resolving power.

In an astronomical telescope, the focal length of the objective lens is 100 cm and of eye-piece is 2 cm . The magnifying power of the telescope for the normal eye is

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) (i) Draw a labelled ray diagram to show the formation of image in an astronomical telescope for a distant object. (ii) Write three distinct advantages of a reflecting type telescope over a refracting type telescope. (b) A convex lens of focal length 10 cm is placed coaxially 5 cm away from a concave lens of focal length 10 cm. If an object is placed 30 cm in front of the convex lens, find the position of the image formed by the combined system.

The optical length of an astronomical telescope with magnifying power of 10, for normal vision is 44cm. What is focal length of the objective?

In an astronomical telescope in normal adjustment a straight black line of length L is drawn on inside part of objective lens. The eye piece forms a real image of this line. The length of this image is I . The magnification of the telescope is

The magnifying power of an astronomical telescope for relaxed vision is 16 and the distance between the objective and eyelens is 34 cm. Then the focal length of objective and eyelens will be respectively

The length of an astronomical telescope for normal vision (relaxed eye) ( f_(o) = focal length of objective lens and f_(e) = focal length of eye lens) is

An astronomical telescope has large apeture to