Give the expression for limit of resolution of a microscope along with the meaning of the symbols used.

Explanation

Limit of resolution a microscope is given by `dx=(lambda)/(2n sin theta)`
where `'lambda'` is wavelength of light used to illuminate the points objects, 'n' is the refractive index of the behind between the object and the objective and `'theta'` is the semi vertical angle subtends at the object by the object. Resolving power can increased by placing a retracting medium between the objective and the objective and by illuminating the object by lower wavelength of light like ultraviolet light.