Resolution for a lens from a diffraction standpoint

[rm_girl]

Homework Statement

A lens is designed to work in the visible, near-infrared, and near-ultraviolet. The best resolution of this lens from a diffraction standpoint is

Options:
a.) the same for all wavelengths.
b.) in the near-ultraviolet.
c.) indeterminate.
d.) in the near-infrared.
e.) in the visible.

Homework Equations

The Attempt at a Solution

 

[technician]

do you know how diffraction depends on wavelength

 

[rm_girl]

shorter wavelengths get diffracted at greater angles?

 

[rm_girl]

So would it be near-infrared because it has the longest wavelength, therefore less diffraction?

 

[technician]

for a lens of a given SIZE you get less diffraction for a short wavelength !
think about it
Which has the shortest wavelength?

 

[rm_girl]

Ultraviolet would have the shortest

 

[technician]

That is correct so all other things being equal there is less diffraction for UV, visible and infra red in that order.

 

[rm_girl]

Thanks