HardOCP News
[H] News
- Joined
- Dec 31, 1969
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Yes, I said a camera that captures one trillion frames per second. Leave it to the folks at MIT to come up with something like this.
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I saw alot of nothing in that to be honest..... am I alone in that?
So where are the photos taken by this camera? all I have seen are CGI approximations.
So where are the photos taken by this camera? all I have seen are CGI approximations.
This has got to be horseshit. A trillion is a far larger number than most people are capable of comprehending. For instance 1 billion seconds equals 31.7 years but a trillion seconds is 31,688 years.
This has got to be horseshit. A trillion is a far larger number than most people are capable of comprehending. For instance 1 billion seconds equals 31.7 years but a trillion seconds is 31,688 years.
(By the way, playing back one millisecond of 1T FPS video, playing back at 60 fps, would take over 30 years.)
It's horseshit because a trillion is a big number? I guess since the national deficit is 15 trillion dollars, it must not exist because that's "too big" a number, right?
holy fuk, that was a real video of a point of light traveling through the bottle? (and the apple scene)
I used to move at a trillion m/s, then I took a titanium sapphire laser to the knee.
The bottle one wasn't CG.So where are the photos taken by this camera? all I have seen are CGI approximations.
I aint too smart and such, really, not a physicist, but the example of trying to detect a sound wave with sonar was good...at first, maybe, but light does interfere with itself...like the classic double slit experiments, so maybe light could be used to detect light, no? I ceretainly am not arguing...more like wildly speculating...would someone who reads books and stuff tell me if this would also violate the Shrodigers cat thing....I am not sure this applies to photons...but how can you measure something that small without altering it...like if you could bounce a photon off another photon...would there be some imparted energy that would change both the wavelength and the trajectory or the original photon? My head hurts. Please help.
When you are speaking macroscopically, you're talking less about EM radiation being photons and more about it being alternative EM fields. Mathematically, these fields obey simple wave equations where the amplitudes of the waves can add constructively and destructively, giving rise to EM interference.
When you're talking about the more precise versions of the double slit experiment where they send particles one at a time, you begin to enter the regime of quantum mechanics. The wave function that represents the photon in quantum mechanics can interfere with itself (just like an electron or a proton can interfere with itself). It is not intuitive, but the math is consistent with the experimental results.
This is going to get technical now.
When you talk about things on the level of quantum electrodynamics (quantum field theory) you'll think of a quantized spin 1 photon field. In the Lagrangian for QED, this field does not interact with itself directly. In the parlance of Feynman diagrams, you never see two photon lines intersect directly. A photon does not interact with another photon to first order in the expansion of the path integral.
BUT, past the first order "tree level" expansion you can have photon-photon scattering through something akin to vacuum polarization. Essentially, this can be seen as two photons creating electron-positron pairs which then annihilate one another into two new photons that do not necessarily have the same trajectories/energies as the initial photons that went into the interaction. Without knowing about the virtual interactions on the interior of these scattering events, it looks like photon-photon scattering from the outside.