"This new camera literally makes it possible to freeze time"
It literally freezes time? Come on..
Camera freezes time at 10 trillion frames per second
81–90 of 96 posts
Re: Camera freezes time at 10 trillion frames per second
#82“It’s an achievement in itself,” says Jinyang Liang, the leading author of this work, who was an engineer in COIL when the research was conducted, “but we already see possibilities for increasing the speed to up to one quadrillion (1015) frames per second!” Just getting started... o_O
Honest question, what can be seen at one quadrillion fps that 10 trillion cannot already see? This question is out of pure ignorance and wonder, like "Why would you ever want to move faster than a horse". But this is at a scale I just cannot think in anymore.
At that speed you can measure the "echos" of light, using femto-photography and some computing, it's possible to image objects around corners, outside of the cameras line of sight.
More info: http://web.media.mit.edu/~raskar/cornar/
Theres a few videos around of Raskar demonstrating this.
Re: Camera freezes time at 10 trillion frames per second
#83Earlier quoted context omitted.
Watching this confuses me as to the timing of it all... if the conceit is that we're watching the bundle of photons move through the bottle that's because the photons from the source are hitting the camera, right? So is it the light moving through the bottle + the travel time to the sensor? Should refraction and reflection across the surface cause a lot of weird visual interference (as the bottle's size is no longer…
I had this similar realization when I watched that video from 2011 the first time around (hard to believe it was 7 years ago). It also gave me this odd sense of blindness, in that I cannot actually see what's in front of me, only what literally interacts with my retina, almost like it's made of tastebuds for light. Still weirds me out when i think about it.
Your eyes are terahertz radio receivers!
Re: Camera freezes time at 10 trillion frames per second
#84Earlier quoted context omitted.
Honest question, what can be seen at one quadrillion fps that 10 trillion cannot already see? This question is out of pure ignorance and wonder, like "Why would you ever want to move faster than a horse". But this is at a scale I just cannot think in anymore.
Imagine expirmental physics. Being able to watch things like explosions in super minute detail. Watching light propogate.
Umm good luck getting enough photons to see anything. Shot noise
Re: Camera freezes time at 10 trillion frames per second
#85Re: Camera freezes time at 10 trillion frames per second
#86How many frames per second would you need to film at for a photon of light to be in an identical position on 2 frames?
For 635nm red laser light, you'd need to be sampling somewhere in the order of 9.4 x 10^14 times a second to get two samples per cycle. Based on roughly 300000000m /635nm x2 but then the question comes down to how many cycles make up a photon and does that question even. Make sense in the first place.
>9.4 x 10^14
Can you explain how did you get this number for the red wavelength?
Also can we fundamentally "see" a photon?
Re: Camera freezes time at 10 trillion frames per second
#87I imagine this would give discoveries in the LHC a boost, or at least some amazing footage of atoms colliding and exploding :) That would be amazing!
No, for a few reasons:
First they are producing too many collisions (probably many quadrillion of collisions, I can't find the exact number). Most of the are boring, so they have a lot of filters to select and save only the slightly interesting collisions, because otherwise it would be impossible to save the data. IIRC they only got a few thousand of Higgs bosons, he signal to noise ratio is almost 0.
Second to film something using light, the object must be bigger than the wavelength of the light. There are some tricks to reduce this a little, but you can't film elementary particles directly. The old method was to let the particles create small bubbles or drops of water inside a recipient, and then photograph the chain of dots with visible light. In the new equipment the process is more complicated, but the interesting part of the collision is too fast and too small. They only measure the particles that are flying away after the interesting part happened, they only measure the leftovers and try to reconstruct the actual collision.
Third, the interesting collisions have strong quantum effects, and the quantum effects "disappear" when you are using light that is strong enough to get an accurate position of the particles. You can imagine that if the light is strong enough, then the light itself will bounce against the particles and modify the direction and the collision. It sounds somewhat like magic, but it's possible to write this correctly and precisely using a lot of math and is one of the bases of quantum mechanics. https://en.wikipedia.org/wiki/Uncertainty_principle
Re: Camera freezes time at 10 trillion frames per second
#88Earlier quoted context omitted.
Imagine expirmental physics. Being able to watch things like explosions in super minute detail. Watching light propogate.
Umm good luck getting enough photons to see anything. Shot noise
So shoot at 1 quad, and average 1000 frames to one output frame? Light will still be moving less than 1mm per frame.
Re: Camera freezes time at 10 trillion frames per second
#89Earlier quoted context omitted.
Honest question, what can be seen at one quadrillion fps that 10 trillion cannot already see? This question is out of pure ignorance and wonder, like "Why would you ever want to move faster than a horse". But this is at a scale I just cannot think in anymore.
At that speed you can measure the "echos" of light, using femto-photography and some computing, it's possible to image objects around corners, outside of the cameras line of sight. More info: http://web.media.mit.edu/~raskar/cornar/ Theres a few videos around of Raskar demonstrating this.
Wow. Thought this would be used for experimental physics, not another spying device! Cool stuff though.
Re: Camera freezes time at 10 trillion frames per second
#90Earlier quoted context omitted.
Imagine expirmental physics. Being able to watch things like explosions in super minute detail. Watching light propogate.
Umm good luck getting enough photons to see anything. Shot noise
It's already being done. https://m.youtube.com/watch?v=EtsXgODHMWk