Samwell Seed Well
Well-Known Member
sorry i keep forgeting the topic is photons, and get side tracked
photons , photons at rest have no mass, until a force is exerted on it
like gravity . .or a black hole and that is why light is warped like any other mass in a black hole
isd this correct i made a black hole post a fewe pages back
\frac{1}{r} e^{-\frac{m_\gamma c r}{\hbar}}
equation wont transfer nicely
"
It is not known absolutely for sure that photons do not have mass. However, there is an experimental upper limit on what that mass could be; and it's pretty darn small.
Additionally, if photons had mass, there should be a third possible polarization for light, and electrostatic potentials should fall off as
To understand the statement that even light can't escape from a black hole, you have to understand a little bit about how general relativity describes gravity.
General relativity says that the presence of mass (or energy or momentum or pressure, etc.) actually bends the fabric of space and time. When the path of a particle is affected by gravity it happens, not because the particle is feeling a force, but because the particle is travelling along what is effectively a straight line path on a curved surface. When you think about it this way, it seems natural that even light should be affected.
A black hole is simply the case where space and time are so bent that every single straight line path that exists leads to one single place. (Of course, to be exact, we should say that every path that exists inside the event horizon leads to one single place. Outside the event horizon, there are paths that don't lead into the black hole.)"
photons , photons at rest have no mass, until a force is exerted on it
like gravity . .or a black hole and that is why light is warped like any other mass in a black hole
isd this correct i made a black hole post a fewe pages back
\frac{1}{r} e^{-\frac{m_\gamma c r}{\hbar}}
equation wont transfer nicely
"
It is not known absolutely for sure that photons do not have mass. However, there is an experimental upper limit on what that mass could be; and it's pretty darn small.
Additionally, if photons had mass, there should be a third possible polarization for light, and electrostatic potentials should fall off as
[FONT=MathJax_Main]1[/FONT][FONT=MathJax_Math]r[/FONT][FONT=MathJax_Math]e[/FONT][FONT=MathJax_Main]−[/FONT][FONT=MathJax_Math]m[/FONT][FONT=MathJax_Math]γ[/FONT][FONT=MathJax_Math]c[/FONT][FONT=MathJax_Math]r[/FONT][FONT=MathJax_Main]ℏ[/FONT]
.To understand the statement that even light can't escape from a black hole, you have to understand a little bit about how general relativity describes gravity.
General relativity says that the presence of mass (or energy or momentum or pressure, etc.) actually bends the fabric of space and time. When the path of a particle is affected by gravity it happens, not because the particle is feeling a force, but because the particle is travelling along what is effectively a straight line path on a curved surface. When you think about it this way, it seems natural that even light should be affected.
A black hole is simply the case where space and time are so bent that every single straight line path that exists leads to one single place. (Of course, to be exact, we should say that every path that exists inside the event horizon leads to one single place. Outside the event horizon, there are paths that don't lead into the black hole.)"
).
. massless, yet destroy dna. BOOM
