Recent content by prj45

Yup, thanks everyone, v interesting. I'll not ask what started all this movement off in the first place... :p

So, what would happen if I had a single molecule in a perfect vaccum, and introduced a single photon, and that photon was absorbed by one of the atoms in the molecule? Would the molecule move?

Head on collision with another with exactly the right circumstances?

So, I'm still not getting what causes the locomotion of molecules. If I reduced temperature to 0K, then warmed it up again, what makes it move off in a particular direction?

So, I'm still not getting what causes the locomotion of molecules. If I reduced temperature to 0K, then warmed it up again, what makes it move off in a particular direction?

So could I just stop a molecule of hydrogen gas, and if I did would it just sit there, presuming its on its own.

So why's it going at 6000 m/s? If its all down to internal vibrations, where's the imbalance that causes it to propogate in one particuler direction?

I mean, I know that they move faster the more energy there is, but why do they move at all in the first place? Would a single molecule move if gravity wasn't acting on it and it didn't touch anything else?

I was prompted by this story : - http://www.guardian.co.uk/life/science/story/0,12996,1456747,00.html I understand that theories that suggest that the big bang happened are strongly backed up by observations, but are there many of these observations that could be scientists seeing what...

Did we still have a big bang?

If I understand it, photons on the event horizon of a black hole can go over the speed of light by the plank constant. If they do this, what happens to their path through time?

Re: Photons interfering with themselves. Considering they move through space at light speed, this means they don't move through time right? So, surely, they must interfere with themselves, as from our point of view, they'll be everywhere at once (until we observe them and bring them into our...

Ah, so my question is why are the permeability and permittivity constants the values they are.

"why is the speed of light the same in all frames of reference" nope, not that. OK, why does the speed of light appear to be the speed it is when measured? What initial condition caused it to be the speed we observe it at, and not 10m/s for instance?

Can anybody explain it to me?