Define resolving power of a simple astronomical telescope.

Explain the statement; ‘Angular magnification of a compound microscope in normal use is $30”$.

With regard to an astronomical telescope of refracting type, state how will you increase its : (i) magnifying power (ii) resolving power.

Draw ray diagram for astronomical telescope in normal adjustment and write its magnifying power and length.

Draw ray diagram of compound microscope. Write its magnifying power in normal adjustment. If objective and eye-piece are interchanged, will it behave like a telescope? Explain.

Draw labelled ray diagram of reflecting telescope, write its magnifying power and write its advantages over refracting telescope.