Science
Related: About this forumone trillion frames per second, so detailed it shows light itself in motion
transcript from the ted talk.
I present you a new type of photography, femto-photography, a new imaging technique so fast that it can create slow motion videos of light in motion. And with that, we can create cameras that can look around corners, beyond line of sight or see inside our body without an X-ray, and really challenge what we mean by a camera.
1:17
Now if I take a laser pointer and turn it on and off in one trillionth of a second -- which is several femtoseconds -- I'll create a packet of photons barely a millimeter wide, and that packet of photons, that bullet, will travel at the speed of light, and, again, a million times faster than an ordinary bullet. Now, if you take that bullet and take this packet of photons and fire into this bottle, how will those photons shatter into this bottle? How does light look in slow motion?
2:17
Now, the whole event -- (Applause) (Applause)
2:24
Now, remember, the whole event is effectively taking place in less than a nanosecond that's how much time it takes for light to travel but I'm slowing down in this video by a factor of 10 billion so you can see the light in motion.
2:41
But, Coca-Cola did not sponsor this research. (Laughter)
the video............... and link
http://www.ted.com/talks/ramesh_raskar_a_camera_that_takes_one_trillion_frames_per_second/transcript?language=en
Warpy
(111,339 posts)Some TED talks make it over to You Tube and some don't. This one did.
ProdigalJunkMail
(12,017 posts)and i have to say, i never get tired of nor fail to feel amazement at the technology and science required for this video to be created.
i LOVE his line about the bullet through the apple being a very boring movie if filmed at these frame-rates!
sP
Warpy
(111,339 posts)Now they're on to attophotography and have managed to photograph things like an electron bond. It's harder to relate to than the packet of photons going through the Coke bottle, but amazing to us geeks.
I wish Edgerton had lived to see this stuff.
ProdigalJunkMail
(12,017 posts)seeing theory come to life (and be proven and strengthened) makes me tingle... sort of Isn't Edgerton the one who did the photography of the nuclear blasts? i guess i could google it...
sP
F4lconF16
(3,747 posts)I would love to read up on attophotography.
Warpy
(111,339 posts)and it wasn't much of an article on the technique, just an announcement that the bonds had been photographed in motion for the first time plus an animated .gif.
I can't find the original article, sorry, just articles with still images.
F4lconF16
(3,747 posts)I was googling it and couldn't find anything--any idea where one is?
Warpy
(111,339 posts)and there was a blip of sorts on a mass site. "Attophotography" barely got a mention as the technique used.
Check out some of the stills, though, they look remarkably like those Tinker Toy models we all had to make in Chem 101, the geometry exactly as predicted.
But hell, I hate it when stuff disappears down the memory hole so quickly.
F4lconF16
(3,747 posts)If so, was this it? You're right that it looks pretty close.
I'm a little surprised that got as little attention as it did though--maybe the mainstream science media hasn't decided to blow it up yet?
Warpy
(111,339 posts)It was hard to see, but it was there.
They're probably working on some sort of earth shattering presentation about it.
marym625
(17,997 posts)Since sliced bread! Awesome! Thanks for sharing
LifeLoveLib
(6 posts)That's neat.
Gin
(7,212 posts)Thanks for sharing.
Gin
Hekate
(90,793 posts)srican69
(1,426 posts)if a packet of photon can only travel a distance dx ... how are we able to observe the movement of the packet (the scattered beam) at distance more than dx away?
or Are we ( or the camera) just observing the phenomenon on a delayed basis?
Think about it .. By the time we capture the first frame of the laser bullet - the bullet might have already gone out the other end of the bottle?
byronius
(7,401 posts)Human eye sees, like, nothing.