Describe a reflecting telescope. Give its merits and demerits.

Explain two advantages of a reflecting telescope over a refracting telescope.

Draw a labelled ray diagram of a reflecting type telescope. Write its any one advantage over refracting type telescope.

Describe a Terrestrial telescope. Calculate its magnifying power.

Describe a wind mili and give its functions?

Describe passive immunity. Give its significance and drawbacks.

Describe Hill reaction. What is its significance?

Define Resolving power of a telescope. On what factors does its value depend?