Article says:
- Similarly, the amount of time it takes a photon to travel one Planck length is Planck time: 10-43 seconds. This is the smallest meaningful division of time.
Shouldn't that be more accurately the amount of time it takes for a particle travelling at the speed of light in a vaccum one Planck length? Photon's can travel slower than the speed of light in a vaccum in some circumstances, can't they? -- SJK
I don't think that the photons actually slow down. I believe that the slow down in a refractive material is due to the absorbtion and re-emission of the photons; slowing down the wave as a whole. I may, of course, be wrong. --BlackGriffen
Shouldn't the title of the article contain an apostrophe, or is that not possible? --BlackGriffen
Also could someone post the equation for Planck's length and explain in detail why two points separated by less than Planck's length are indistingushable? I think it has something to do with heisenberg's uncertainty principle?