Home
Class 12
PHYSICS
An astronomical refractive telescope has...

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm .

A

The length of the telescope tube is 20.02 m

B

The magnification is 1000

C

The image formed is inverted

D

An objective of a larger aperture will increases the brightness and reduce chromatic aberration of the image

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
Promotional Banner

Topper's Solved these Questions

  • OPTICAL INSTRUMENTS

    CHHAYA PUBLICATION|Exercise Exercise(Multiple choice questions)|18 Videos

  • OPTICAL INSTRUMENTS

    CHHAYA PUBLICATION|Exercise Exercise (Very short Answer Type Questions)|22 Videos

  • OPTICAL INSTRUMENTS

    CHHAYA PUBLICATION|Exercise Ncert Textbook Questions With Answer Hint|8 Videos

  • Magnetic Properties of Materials

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|11 Videos

  • QUANTUM THEORY

    CHHAYA PUBLICATION|Exercise CBSE Scanner|29 Videos

Similar Questions

Explore conceptually related problems

A planet is observed by an astronomical reflecting telescope having an objective of focal length 16 m and eyepiece of focal length 2 cm

A small astronomical telescope has an objective of focal length 50 cm and an eyepiece of focal length 5 cm . It is focussed at the sun and the final image is formed at a distance of 25 cm from the eyepiece . If the diameter of the sun subtends an angle of 32' at the centre of the objective calculate the angular magnification of the instrument and the actual size of the image.

A compound microscope has an objective lens of focal length 1 cm and an eyepiece of focal length 2.5 cm . (i) If a distinct image of an object situated at a distance of 10.5 cm from the objective is seen , the magnification will be

A telescope has an objective lens of focal length 200 cm and an eyepiece with focal length 2 cm . If this telescope is used to see 50 meter tall building at a distace of 2 km, what is the height of the image of the building formed by the objective lens ?

A microscope has an objective of focal length 1 cm and an eyepiece of focal length 4 cm . The distance between the lenses is 14.5 cm . An object of height 1mm is placed at a distance of 1.1 cm from the objective . Determine the position and size of the image seen through the microscope.

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 come out from the eye lens. If the object subtends an angle 2^@ at the objective , what is the angular width of the image ?