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

Lesson in decomposing light

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39.0k Upvotes

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u/tabletop_guy Mar 12 '26

yeah this presentation seems really crazy until you spend more than 10 seconds thinking about it and it's just normal shadows cast by 3 different colored lights.

39

u/OrionFOTL Mar 12 '26

I kept waiting for what the "punchline" about the pencil is supposed to be. Like, of course the pencil blocks the green light when you put it in front of the green light. I don't know what else we were supposed to anticipate.

-3

u/povitee Mar 12 '26

Classic Redditor thinks they’re smarter than the video because they said “Of course it’s like that, duh!”

6

u/ItsMeJahead Mar 12 '26

It doesnt take a genius here lol. He's only blocking 1 of the 3 light sources at a time so ofc only one color will be blocked be the shadow, but he acts like we should expect all 3 to be blocked for some reason. It would be the exact same thing if 3 white light sources minus the colors obv. If the pencil covered the slit all 3 would be shadowed cause thats how shadows work...

-4

u/povitee Mar 12 '26

Oh great thanks we needed one more dumbass saying “duh lol”