Calculate the resolving power of a telescope when light of wavelength `540 nm` is used. Diameter of objective lens is `6 cm`.

A telescope has an objective lens of diameter 5 inch. Calculate the resolving power of the telescope when light of wavelength 5,500 Å is used.

Limit of resolution of a telescope is 4.88 xx 10^-6 rad for light of wavelength 560 nm. Diameter of objective is

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

The ratio of resolving power of telescope, when lights of wavelength 4400 overset@A and 5500 overset@A are used, is________.