Recent content by kannank

I am having a variation of the classic simultaneity experiment (Explained in http://en.wikipedia.org/wiki/Relativity_of_simultaneity#The_train-and-platform_thought_experiment) From the midpoint of a train 2 laser beams are sent to both sides of the train. The beams reach the 2 end-points of...

Then what stops me from accelerating my spaceship to FTL? I still got fuel left in my spaceship.

When the an object is accelerated and when the velocity approaches the speed of light, its mass increases exponentially the force required to accelerate the object increases exponentially. So it cannot be done. Fine. But what if I travel in a spaceship with A LOT of fuel and the spaceship is...

I didn't get a word you said. Yet, you must be right. The 'observable' space-time must be a 'Riemann Curvature tensor' thingy. Yes?

The idea is as you as an observer in a closed capsule cannot differentiate between Situation-A and Situation-B. This is called the principle of equivalence. After the formulation of space-time continuum in Special theory of relativity, the immediate afterthought was "What happens to...

Good we have sort of an agreement (though hazed by the virtual particles) Now consider a proton-proton collision at 3TeV + 3TeV = 6TeV. During the event of collision, we know a 6TeV energy is involved ( plus ~ 2 GeV restmass-energy equivalent of the 2 protons). From the quantum theory of...

It was my mistake to drag bosons and boson-fermion collisions into this discussion. Let's just stick to photons and let's stick the the original problem. "Does photons involve in an event collectively?" Is there any 'single unbreakable' event (pair-production or otherwise) where 2 or more...

Here you are! You do know I meant those 'pure' bosons in Standard Model, don't you?

No pair-production mechanisms is explained with bosons involved in collision experiments. If true pair production is possible with bosons, it would happen naturally. You don't need an accelerator for that. Bosons already travel at speed-of-light. You can't accelerate them, anyways. Now I do...

True. But this has nothing to do with the frozen-photon model we are talking about. This is an already existing question. During pair-production why do we always see matter from the list of standard model and its corresponding anti-particle? When there are possibilities of creating particles of...

Thanks for a good reply. I have some questions though. First of all, we shouldn't have mixed usages of 'photon' & 'quantum of energy'. It's confusing. I was the one to make that mistake. Sorry. My understanding about pair-production happens when fermions (hadrons specifically ) collide...

Thanks. What I explained is clearly not a mathematical model. A 'slow photon' is like a 'frozen photon'. Analogues to water getting frozen to ice in a refrigerator, photon gets frozen to mass under certain conditions. for instance, the energy quantum created during high energy collisions...

Pair-production is the event when a particle and anti-particle is created from a single photon. We don't see 2 or more photons participating in a single pair-production event. Further, it seems in all the events of energy-mass conversion, photons act independently. Two or more photons can...

That's why I said 'hypothetical'. Anyways how can you be sure about not having one? With so many unexplained phenomena around us, let's be open. Collapsing the probability wave-function has nothing QM about it. It's plain probability theory. QM used it from probability theory. When you...

Does this violate causality? Like I said the what if the communication happens in a hypothetical non-relativistic axis. Even if it happens I don't think there could be any causality violations. See the below 'experiments'. Thought Experiment 1 - If we have a pair of entangled coins. I...