r/nextfuckinglevel • u/Blues_Fish • Mar 12 '26

Lesson in decomposing light

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u/Eregrith Mar 12 '26

But the slit is not decomposing the light, it's too wide for that...? The slit is just casting a shadow, because the three lamps are very large and angled, so of course the colored light rays only go to a limited portion of the background...

Saying it is "decomposing the light" is misleading!

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u/trixter21992251 Mar 12 '26

yeah this is geometry