(a) Define the term ‘resolving power of a telescople’. How will the resolving power be effected with the increase in (i) Wavelength of light used. (ii) Diameter of the objective lens. Justify your answers.
(b) A screen is placed 80 cm from an object. The image of the object on the screen is formed by a convex lens placed between them at two different locations separated by a distance 20 cm. Determine the focal length of the lens.12
a) Resolving power of a telescope is defined as the reciprocal of the smallest
the angular separation between two distinct objects whose image can be just
resolved by it
i)
As wavelength increases, R.P. decreases
ii) As the diameter of the objective lens increases, R.P. increases
b)