Question

the resolving power of a telescope can be increased by increasing
a)wavelength of light
b)diameter of objective
c)length of the tube
d)focal length of eyepiece​

Answer 1

Answer:

The resolving power of a telescope can be given as :

Resolving power = 1/d(theta) = 1/ 1.22 lambda / D = D/1.22 (wavelength)

So, resolving power can be increased by decreasing the wavelength and increasing the diameter of objective.

So, option (B) is correct.

Answer 2

the resolving power of a telescope can be increased by increasing

a)wavelength of light

b)diameter of objective

c)length of the tube

d)focal length of eyepiece

ANS:-b)diameter of objective

because, the resolving power of the telescope:-

R= a/ 1.22$\lambda$

where, R is a diameter of the objects.

so, R increase when a is increased and a increased when aperture of objective is increased.