Cherenkov Definition and 41 Threads

Which physics concepts and phenomena other than "CP violation" have to deal with the breaking (not validity) of "Invariance of Time Reversal", like for the Weak Force (e.g. for beta-decay)? The underlying mathematical and physical theory to this inquiry is based on advanced physics textbooks as...

I got this question from my son last night. If you Google "Why is Cherenkov radiation blue", you get this: Somewhat more substantial is the Wiki article on the Frank-Tamm formula. That formula ties the Cherenkov radiation wavelengths to the transmission characteristics at any specified...

Hi, I want to try to solve this puzzle in my head. They say that faster than c travel would break causality. And yet particles can travel through a medium faster than light can in that medium. But surely if that can happen then a particle can arrive at a place faster than information about the...

So far I have an R928 Hamamatsu pmt from ebay, that I believe will be good since it has UV glass, and the majority of the photons should be in the UV range. I also have an old Brandenburg pmt HV power supply but need a BNC connector to use it. I already have a good rigol oscilloscope. Soon I...

cos(theta)=c/vn cos(1.2 degrees)=((3*10^8)/v(1.03)) v=291262135.9 v/c=.971 so the particle is moving at (.971)c But mastering physics tells me this is wrong, and says that I'm not account for the angle. I am really stumped.

If a double slit experiment utilized photons from Cherenkov radiation under water, Would we expect the same results?

Hi All, Can somebody tell me what's the speed of the Graviton? As for Cherenkov Radiation, does exist a similar effect for Graviton? Thanks

If I have a beam of protons that go into a block of water, how can I know how many photons will be produced along the beam path?. I'm assuming all the photons have the same energy. I know that the energy deposition will follow a Bragg Curve, and I think that energy deposition is probably...

Hi All I read somewhere that at close to C the light emitting from a regular light globe ie diffuse light in all directions, will form a cone. what is the thinking behind this and does anyone have a link where I can read about it ?

Homework Statement [/B]Homework EquationsThe Attempt at a Solution I find something contradictory about the cherenkov angle for the above two image[/B]

What exactly is the physical origin behind light produced by Cherenkov radiation having a non-zero angle with the trajectory of superluminal charged particle? Why is the light simply not allowed to go in any direction? Also, is Cherenkov radiation observed for "uncharged" particles (e.g...

Hello During a simulation of light in gamma-scintillator interaction, it seems that there are a lot of Cerenkov photons. I don't know their contribution to the final intensity (it will need a long time to compute it). The textbooks usually say that the gamma ray will produce secondary...

If dolphins thought the universe was just a really big ocean, and if they had come up with the theory of general relativity, how would the fact that certain particles radiate faster than light through water shape their version of the theory? Would it be essentially the same with the human...

Cherenkov radiation is described as being generated by a charged particle moving through a dielectric medium with a velocity greater than c/n, where n is the refractive index in that medium. Since n varies with frequency, there is a cutoff where n drops below 1 and no radiation is emitted above...

Hello everyone, Can atomic or subatomic neutral composite particles that consist charged particles emit cherenkov radiation if they are polarised strongly enough (and are fast enough)?

Will particles that don't interact with normal matter (dark matter for example) emit cherenkov radiation (if light in that medium moves slower than that particle) ?

Homework Statement If all we know is that the media is 1.001, how can we compute the Cherenkov angle and threshold momentum of electrons,muons, pions, and kaons?Homework Equations I know that cos(theta_c) = 1/beta*n, where beta = v_p/c and n=c/v_em, where v_p is the particle velocity and v_em...

If the image we obtain from Cherenkov light is actually the projection of a continuous wave front (Fig. 1) on a vertical plane, orthogonal respect to the direction of propagation of the incident particle, why we just see a ring (Fig. 2), instead of a full circle? Is it because Cherenkov light is...

Someone on another forum shared with me that a 6L6 vacuum tube exhibits a blue dot when in operation that is supposed to be Cherenkov radiation. I say nay, as I have worked out the relativistic velocity using $$KE={ m }_{ 0 }{ c }^{ 2 }\left[ \frac { 1 }{ \sqrt { 1-\frac { { v }^{ 2 } }{ { c...

So I'm a senior at a lesser known university, I 'believe' I did very well on my PGRE though I don't have my scores yet, and I've maintained a 3.7 average in my physics courses. The only thing holding me back from admission into a fantastic grad program is my complete lack of research experience...

This is GR9277, Problem 69. I know nothing about this thing. At 'http://grephysics.net/ans/9277/69' someone said it's about Cherenkov radiation. I think this is about interaction of charged particles with matter. In what course is this covered? What book do you recommend for studying this?

Why must the charged particle that leads to Cherenkov radiation travel faster than the phase velocity of light not the group velocity of light? One of the sides of the triangle that is used to define cosθ is v=c/n i.e. the phase velocity. I don't see why it's one rather than the other. Thanks!

As far as I know, Cherenkov radiation occurs when a charged particle travels through a medium at a greater phase velocity than the speed of light in that medium. Molecules in that medium are polarized and after de-excitation emit radiation. But there are a couple of things about Cherenkov...

I was reading an article about Cherenkov radiation in wikipedia. If the electron moves slower than light the EM waves in the medium are destructive and if they travel faster than light waves are constructive .Why so?When the electron travels faster than light the radiations cannot interfere...

If I'm correct, Cherenkov radiation is caused when particle moves faster than light in a certain medium. Can neutrinos, say, traveling through water, cause Cherenkov radiation then? Or is there a property of neutrinos which prevents that?

Hello! The question refers to the supposed tachyons. Many experiments have been conducted based on cosmic ray studies with the following assumption: " If particles with u>c exist then they should emit Cherenkov radiation in vacuum. Thus... Let's detect it!" How can this argument stand...

If I had 2 charged slabs that were moving together at relativistic speeds would both slabs emit cherenkov radiation. In each of the rest frames of the slabs the other slab is approaching it at a speed that is faster than the group velocity of light in its material.

Do neutrinos passing through matter emit some kind of Cherenkov radiation like charged particles do?

http://www.innovations-report.de/html/berichte/physik_astronomie/inauguration_ceremony_h_e_s_s_ii_telescope_203113.html?utm_medium=twitter&utm_source=Innovations-Report World’s largest Cherenkov telescope opens. Does anyone know what it is meant to study and what it expects to see? I felt...

For a ground-based Cherenkov radiation detection, what are the theoretical/practical constraints on the gamma-ray energies we can detect? Simply speaking, if we have something like an IACT observatory, how do we know it's low and high energy detection limits? Is the higher one due to Cherenkov...

I was watching a video about Cherenkov radiation, and they had these big water filled detectors. They said they were used to study neutrino interactions. But only charged particles or particles with a magnetic field can emit cherenkov light. So the neutrinos can't emit Cherenkov light, they are...

questions about the Soviet's Venus missions I was reading about the Soviet Union's Venus missions and they equipped Venera 9 orbiter with cherenkov detector. So it detects particles traveling faster than the speed of light in a given medium What was this Cherenkov detector used for? It...

If you get an electron going faster than the local speed of light i know that it starts emitting light, but why does it do this?, furthermore, In a theoretical material with an infinite index of defraction (a.k.a light is stopped within it), wouldn't that cause the system to quickly go to near...

How we can calculate energy and intensity of Cherenkov radiations ? Answer with number will highly be appreciated.

I only recently began reading about Cerenkov radiations and I've got so far as reading how the photons are emitted (which I think isn't very far!) Now I have a few questions from that point on: a. I take it the charged particle that zips through the dielectric polarises the atoms and when...

After writing a physics paper on carbon nanotubes, I've been constantly wondering about a theory I invented and investigated in it, the theory being that because the electrons in carbon nanotubes travel closer to the speed of light when under the effects of any potenital difference than most...

Here are two pages showing examples of the Cherenkov radiation: http://physics.syr.edu/hep/rich.html http://www.iss.infn.it/webg3/cebaf/hadron.html I don't understant why the cone is ahead of the particule path. I thought that the cone of light formed behing the particule path (like the...

Is the aurora (as in "borealis") caused by Cherenkov radiation... ...or something else? thank you. -- faye kane, idiot savant

Homework Statement See here: http://www.jyu.fi/kastdk/olympiads/ (year 2008, theoretical question set 2, question 2) Let us consider a beam of particles moving with velocity v>c/n, such that the angle θ is small, along a straight line IS. The beam crosses a concave spherical mirror of...

Ok, so I've heard of Cherenkov Radiation and its azure bluish glow but how is it created? What experiments produce it?

Hi. The way I understand it, if a charged particle passes through a medium, it disrupts the EM field in that medium. And that causes the medium's electrons to emit photons in order to restore equilibrium in the positions of the disrupted electrons. Right? However, I'm not sure where the fact...