Quote:
Originally Posted by cal_guy
Sorry but you're completely wrong, we're talking about light here which travels just under 3 meters per hundred-millionth of a second in air. No array of cameras could capture that.
http://web.media.mit.edu/~raskar/trillionfps/ |
I'm not really planning on arguing on CP, but I will explain my case. Let me preface this my saying that I have an honors degree in electrical engineering and physics, so this is right up my alley. The array of cameras are triggered by a super accurate pulse generator - these are common in modern laser labs. The source light, which looks like a single beam of light in the video, is a strobe that flashes many times so they have a lot of chances. A mirror deflects this light into the camera array. In short, this video is essentially a stop motion animation. That is, several still images of the bottle are captured with the light at a different point in the bottle. This is different than a true video of the light moving because the same group of photons are not captured in subsequent pictures; an entirely new flash of light is seen in each picture.
Also, it is fundamentally impossible to capture a traditional video of light moving because information can not move faster than light.