Recent content by Neghentropia

I would imagine it is like you describe. Although I can't quite grasp the meaning of a photon being absorbed by a phonon, given the latter is a quasiparticle. anyway, from this topic as a whole, I think I got that photons, no matter the medium they are travellig through are always going to...

thanks

derek101's answer is very interesting. it explains why the speed of a beam of photons travels at v<c, without the need to slow the actual photons down here ( http://van.physics.illinois.edu/qa/listing.php?id=2026 ) I read: "...As photons go into materials, they become something a...

sorry, I didn't see your previous post!

ok. that's actually pretty straightforward once you deal with the fact that photons are "generated" but the questions I posted above remains. what happens to those photons that are generated into a medium (i.e air, water, glass) where the light is slower than in the vacuum? are they...

and in those means where the photons travel slower than c? (i.e. everything except the void)

Hi, I have a very dumb question in my head: when a photon gets emitted by a source, how long does it take to reach c? the fact it has no mass makes me thinking the acceleration is instantaneous (t=0) but this is from a classical physics point of view (and I also know that around speed of light...

oh, well, of course. if you don't know the primers efficiencies you can't do any quantitation... anyway if you compare genes on different cells lines you may want to use more than one single housekeeping

thanks. I'll give a look in the library. I may be luckyEdit: I am lucky! :) I'll try to get hold of a copy tomorrow cheers!

mhh... the picture is getting clearer. and I mean that I'm given to understand the reason of complex resonances is not well understood (n-body problem) on the other, I hand't considered that orbiting bodies can exchange angular momentum, which explain why a planet can eject an asteroid...

I think that your model clashes with the evidence that universe is expanding in every direction it it was actually crushsing down, I imagine we would see it accelerating but we would also see evidence of shrinking somewhere out there unless the site of the Big-Cruch to be is out of the...

hi Drakkith, thanks for the reply could you explain better how these gravitational perturbations take place? I'm really curious to understand the mechanics behind the phenomenon also, I'd like to introduce in the discussion the subject of clearing the neighbourhood which, as far as I...

do you know where I could read more about the difference between space and time?

dammit... :biggrin: ok, I got the reason why everything rotates. basically just because if it didn't it wouldn't be like it is (something that reminds me of the anthropological principle...) mfb, could you clarify why it's OK to consider time as a dimension for a static snapshopt of our...

ok, here it goes: this afternoon, wandering on wikipedia I stumbled across a 3D projection of a rotating tesseract I spent some time looking at it, then i started thinking about the universe. a bit of context: I've always been passionate for astronomy. I like to read about other planets and...