Home
Class 12
PHYSICS
A simple telescope consisting of an obje...

A simple telescope consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focused on a distant object in such a way that parallel rays emerge from eye lens. If the object subtends an angle of `2^(@)` at the objective, the angular width of the image is (Let `tan theta=theta` assuming `theta` small).

A

`10^(@)`

B

`24^(@)`

C

`50^(@)`

D

`1//6^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • RAY OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise DPP 1.5|13 Videos

  • PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS ENGLISH|Exercise Integer Type|4 Videos

  • SOURCES OF MAGNETIC FIELD

    CENGAGE PHYSICS ENGLISH|Exercise single correct Ansewer type|12 Videos

Similar Questions

Explore conceptually related problems

A simple telescope, consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focussed on a distant object in such a way that parallel rays comes out from the eye lens. If the object subtends an angle 2^(@) at the objective, the angular width of the image

A telescope, consisting of an objective of focal length 60 cm and a single eye lens of focal length 15 cm is focused on a distant object in such a way that parallel rays comes out from the eye lens. If the object subtends an angle 2° at the objective, the angular width of Che image is

Knowledge Check

  • A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

    A
    real, at 30 cm in front of the mirror
    B
    real, at 30 cm behind the mirror
    C
    real, at 10 cm in front of the mirror
    D
    virtual, at 10 cm behind the mirror

  • A small telescope has an objective lens of focal length 144 cm and an eye-piece of focal length 6.0 cm . What is the magnifying power of the telescope ? What is the separation between the objective and the eye-piece ?

    A
    `0.75 cm`
    B
    `1.38 cm`
    C
    `1.0 m`
    D
    `1.5 m`

    • Similar Questions

    Explore conceptually related problems

    A telescope has an objective of focal length 100 cm and an eye-piece of focal length 5 cm. What is the magnifying power of the telescope when it is in normal adjustment?

    The length of a telescope, for which it is known that it has an objective lens of focal length 144 cm and an eye piece of focal length 6 cm is

    A small telescope has an objective lens of focal length 150 cm and an eye piece of focal length 6.0 cm. The magnifying power of the telescope for distinct vision adjustment is:

    A small telescope has an objective lens of focal length 150 cm and an eye piece of focal length 6.0 cm. The magnifying power of the telescope for distinct vision adjustment is:

    An astronomical telescope has an objective of focal length 100 cm and an eye piece of focal length 5 cm. The final image of a star is seen 25 cm from the eyepiece. The magnifying power of the telescope is

    A small telescope has an objective lens of focal length 144 cm and an eye-piece of focal length 6.0 cm . What is the magnifying power of the telescope ? What is the separation between the objective and the eye-piece ?

    Home
    Profile