View Full Version : the black hole problem

2009-Apr-03, 04:29 PM
that was a doozy i love it

i hope a physicist comes by and explains the answer but i think it has to do with the type of mass you are talking about

you are saying the object you speed up has alot of RELATAVISTIC MASS


i dont know how but i think thats the answer



2009-Apr-03, 04:37 PM

light has relatavistic mass ...but no rest mass.... photons dont turn into black holes


i found this someplace.....

Light has mass-energy!

Photons have energy given by E = hf , Planck's equation. Compton equated this with E = mc2 and gave photons a momenta of

p = mc = hf / c = h / λ so a "mass" is assigned m = hf / c2 . This makes light susceptible to gravity, the beginning of General Relativity.

eg; A green photon of wavelength 470 nm will have a momentum of 1.41 x 10-27 kgms-1, and an energy mass of 4.7 x 10-36 kg. Obviously light has no rest mass!

( Note that momentum for light can be described through Maxwell's Equations as well. This value is that given by a very large number of photons. )

you cant turn something into a black hole by speeding it up as you are adding to its relative mass not rest mass

i think