The diagram below shows two identical filament lamps separated by a small distance. Light from the lamps is incident on a narrow slit behind a green filter. The slit is parallel to the filament of each lamp. A photograph is taken of the lamps through the slit. The images of the filaments on the photograph are just resolved.

The green filter is replaced by a red filter and then by a violet filter. For each filter a photograph is taken of the lamps through the slit. Which of the following correctly describes the resolution of the images using a red and using a violet filter?

Options

A.
B.
C.
D.

Answer

C

Explanation

`lamdauarr` resolving power `uarr`
` lamda_("red") gt lamda_("green") gt lamda_("violet")`