Hidden 11 yrs ago Post by Kaga
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Kaga just passing through

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Ok, so, I'm in my room, no real lights on besides the light coming from my laptop, and I'm just sitting around watching Youtube videos and occasionally checking Spam.

And my laptop has a charger (whom you may remember as the accessory of my fez-wearing bedside lamp) which has a small light on the end of it that attaches to the computer. When plugged in, this light comes on orange, and then it turns green when the system is finished charging.

And so while I'm derping around on Youtube, I'm idly holding my thumb over that charger light and I notice that, in the dark, the orange light essentially shines through my thumb and kind of makes it look like my thumb is glowing.

Mildly amused by this, I sort of kept my thumb there on-and-off for a while before I realized that the light had turned green, as it does when I'm finished charging.

But what made me notice this (at least initially) was not the presence of green light but of no light at all as, once the light changed color, none of it shined through my flesh at all. My thumb was enough to totally block the light.

Which is kind of crazy, since the light didn't appear to change in intensity at all - only color.

Man, light is weird.
Hidden 11 yrs ago Post by Overwatch
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Overwatch The Lord of Black Flames

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Different light colors (spectrums), and the light with them get absorbed by different materials. It's what affects how we see colors of various things, such as your skin. Hence your skin absorbs the green spectrums with it's pigments, while not the orange.... I dunno if I'm explaining it right, but, I think that's the way it works.
Hidden 11 yrs ago Post by Raxacoricofallapatorius
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Raxacoricofallapatorius god of shenanigans

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The thing I appreciate most about light is how Griffin uses it to formulate the theory for his invisibility in The Invisible Man. Hang on, lemme see if I can dig it up.

Here it is:



So yeah, classic science-fiction, but it's cool to think that we're actually doing that sort of thing today. Not turning people invisible, mind you, but the opacity and visibility of objects can be changed at will, like smart glass and stuff.

Great book if you haven't read it.
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