The aperture of the objective lens of a telescope is made large so as to

The aperture of objective lens of a telescope is made large so as to

Why is the aperture of objective lens of a telescope taken large ?

The aperture of the objective of a telescope is 0.1 m and wavelenth of light is 6000 Å. The resolving limit of the telescope will approximately be _________ .

If the aperture of the objective of a telescope is decreased, then its resolving power

Why the aperture of objective lens of the microscope is small and that of telescope is large ?

Objective lens of telescope is of _______ .

The aperture and focal length of the objective of telescope are large, why?