cyan. cyan. did you ever wonder why the sea water is a cyan color? it's green and blue. how many people have never wondered that? "so, well, it's cyan--" no, no, no, no, there's a reason why it had to be a cyan. can we have the lights please, ted? sure. -- it turns out that seawater, any kind of water, absorbs, like mad, infrared. in fact, if you take an infrared light and shine it on water, it'll heat up very, very quickly. and it also absorbs a lot of red. so when the sunlight comes down, all the colors, yeah, hits the water. guess what color gets absorbed more than any other. red. no. no, not green. okay. let's try-- let me give you a hint then. begins with r, ends with d. red. yeah, red. good. okay. some people said green. it turns out the red gets absorbed. when the red gets absorbed, is that the stuff that reflects to your eye? no, no. it's been absorbed. you can't absorb then reflect. you take your pick, honey. so if the red gets absorbed, what does the white light become? green and blue. shall i do it again? shall we put the lights off and do it again? yep. and t

you get that green cyan. you got that cyan, the greenish-blue. so the eye over here is gonna see what? greenish-blue, all right? now, you point to the bubble and you say, "hey, that's a greenish-blue bubble right there." right. your friend. your friend looks down. and your friend looks at the same bubble. but for your friend-- this is a different thickness being canceled. maybe this different thickness, maybe what's being canceled here is the yellow. and so your friend sees that light, white minus the yellow, you say, "hey, look at the greenish-blue bubble." and your friend says, "no, it ain't. it's a..." yellow bubble. "blue bubble." so your friends says it's blue, you say it's cyan. who's right? me. what happens in the tub? "i say it's cyan." "i say it's blue." "i say it's cyan." wham, boom--bubble bath. okay, see what's happening? what color you see depends upon what? with everything. what you see depends upon what? do we all see the same thing? no. huh? depends on your point of view. open up the hood of a car, have the mechanic look at it. no