CBSE Class 12-science Answered
Define the term
'resolving power' of an astronomical telescope. How does it get affected on
(i) increasing the aperture of the objective
lens?
(ii) Increasing the wavelength of the light used?
Justify your answer in each case.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
The resolving power of an astronomical telescope is defined as the reciprocal of the smallest angular separation between two point objects whose images can just be resolved by the telescope.
(i) When the aperture of the objective lens is increased,
the resolving power increases, because 
(ii) When the wavelength of the light is increased, the
resolving power decreases, because 
Answered by | 04 Jun, 2014, 03:23: PM
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