Question about perception of colors around light sources

AI Thread Summary
Observations of colors around distant light sources, such as car headlights or street lamps, are attributed to optical diffraction. This phenomenon occurs when light waves bend around edges or obstacles, causing the visible spectrum to separate and become noticeable. The effect is enhanced when a straight edge is placed between the observer and the light source, allowing only a portion of the light to be seen. Understanding optical diffraction can provide insights into this visual experience. Further research on the topic can deepen comprehension of light behavior.
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When I look at a distant light source (like car headlights, or street lamp lights) I notice colors of the visible spectrum (as separated (as in after prism refraction)) immediately around it and it's not just around white light sources.

It becomes more obvious if you place something with a straight edge between your eyes and the light source and fix it so that you see only a bit of light coming over the edge of the object.

Why is this?
 
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OK, thanks!
 

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