question_answer

How does the resolving power of a compound microscope change on (i) decreasing the wavelength of light used, and (ii) decreasing the diameter of its objective lens?

Answer:

                R.P. of a compound microscope \[=\frac{2\mu \sin \theta }{\lambda }\] (i) On decreasing the wavelength \[(\lambda )\] of the light used, so the resolving power increases. (ii) On decreasing the diameter of the objective lens, semi vertical angle \[\theta \] decreases, so the resolving power also decreases.