Question

Q1) The given block diagram represents the construction of a telescope.

Observe it carefully and answer the following questions.

Light source - - - - concave mirror - - - - convex mirror - - - - eyepieces

1) Identify the type of reflecting telescope and why is it called a reflecting

telescope?

2) What is the use of convex mirror?

3) Where do the rays reflected from the convex mirror go?

4) What are the advantages of using such a reflecting telescope?

5) Name the optical telescope which is orbiting the earth at the height of

589km. ​

Answer 1

Answer:

1) Name of telescope : Cassegrain Telescope

2) The convex mirror converges the rays onto the eyepiece.

3) The rays reflected from convex mirror go into the eyepiece.

4) Advantages of reflecting telescopes:

• Reflecting telescopes require large mirrors which are easier to produce as compared to the large lenses used by Refracting Telescopes.
• Reflecting telescopes do not distort colours.
• Maintainance of reflecting telescopes is easier.

5) Hubble Space Telescope.

Hope this helps....