The resolving power of a microscope depends upon all of the following except:
Size of the apeure
Focal length of the eyepiece
Thickness of the film
Wavelength of light source used
Ans: C. Thickness of the film(Ref Bancroft Theory & Practice of Histochemical Techniques/p45-47).Resolving power of microscope:Microscope specific.Inversely distance between two objects that can be resolved.Doesn't depend on specimen nature or thickness.According to Abbe's Criterion.