English

Draw a ray diagram depicting the formation of the image by an astronomical telescope in normal adjustment.

Advertisements
Advertisements

Question

Draw a ray diagram depicting the formation of the image by an astronomical telescope in normal adjustment.

Advertisements

Solution

shaalaa.com
  Is there an error in this question or solution?
2016-2017 (March) All India Set 1

RELATED QUESTIONS

Draw a schematic ray diagram of a reflecting telescope showing how rays coming from a distant object are received at the eyepiece.


Draw a labeled ray diagram to obtain the real image formed by an astronomical telescope in normal adjustment position. Define its magnifying power.


  1. For the telescope is in normal adjustment (i.e., when the final image is at infinity)? what is the separation between the objective lens and the eyepiece?
  2. If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens?
  3. What is the height of the final image of the tower if it is formed at 25 cm?

Draw a labelled ray diagram of an image formed by a refracting telescope with the final image formed at infinity. Derive an expression for its magnifying power with the final image at infinity


"A telescope resolves whereas a microscope magnifies." Justify this statement ?


Draw a labelled ray diagram of an astronomical telescope to show the image formation of a distant object. Write the main considerations required in selecting the objective and eyepiece lenses in order to have large magnifying power and high resolution of the telescope.


Define magnifying power of a telescope. Write its expression.


A giant refracting telescope at an observatory has an objective lens of focal length 15 m. If an eyepiece lens of focal length 1.0 cm is used, find the angular magnification of the telescope. If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is 3.42 × 106 m and the radius of the lunar orbit is 3.8 × 108 m.


Draw a labelled ray diagram showing the formation of an image by a refracting telescope when the final image lies at infinity.


A small telescope has an objective lens of focal length 140 cm and an eyepiece of focal length 5.0 cm. Find the magnifying power of the telescope for viewing distant objects when

  1. the telescope is in normal adjustment,
  2. the final image is formed at the least distance of distinct vision.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×