Resolution for a lens from a diffraction standpoint

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Homework Help Overview

The discussion revolves around the resolution of a lens from a diffraction perspective, specifically considering its performance across different wavelengths including visible, near-infrared, and near-ultraviolet light.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore how diffraction is influenced by wavelength, questioning the relationship between wavelength length and diffraction angles. There is a discussion about which wavelength would yield the best resolution based on diffraction principles.

Discussion Status

The conversation is active, with participants providing insights into how shorter wavelengths correlate with greater diffraction angles. Some participants suggest that the near-infrared may have less diffraction due to its longer wavelength, while others clarify that ultraviolet has the shortest wavelength, leading to less diffraction overall.

Contextual Notes

Participants are considering the implications of lens size and wavelength on diffraction without reaching a definitive conclusion on the best resolution across the different wavelengths mentioned.

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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

 
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do you know how diffraction depends on wavelength
 
shorter wavelengths get diffracted at greater angles?
 
Last edited:
So would it be near-infrared because it has the longest wavelength, therefore less diffraction?
 
for a lens of a given SIZE you get less diffraction for a short wavelength !
think about it
Which has the shortest wavelength?
 
Ultraviolet would have the shortest
 
That is correct so all other things being equal there is less diffraction for UV, visible and infra red in that order.
 
Thanks
 

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