Define resolving power of compound microscope.

Explanation

Resolving power of microscope is defined as its ability to form distinctly separate images of two closely spaced objects.
Resolving power of a microscope is given by
`R.P.= (1)/("Limit of revolution")=(1)/(lambda//2musin theta)`
`R.P.=(2mu sin theta)/(lambda)`
Thus, R.P. of a microscope depends upon (i) wavelength of light used to illuminate the object, (ii) refractive index of the medium in which the object is placed and (iii) semi-vertical angle of the cone of rays staring from the object and entering into the microscope.