Draw a schematic ray diagram of reflecting telescope showing how rays coming from a distant object are received at the eye - piece . Write its two important advantage over a refracting telescope.

Explanation

Advantages:
(i) No chromatic aberration.
(ii) Easy mechanical support (hight mechanical support is required, because mirror weights much less than a lens of equivalent optical quality.)
(iii) Large gathering power.
(iv) Large magnifying power.
(v) Large resolving power.
(iv) Spherical aberration is also removed by using parabolic mirror.