Originally posted by Arbitrageur
Originally posted by Devino
Quasars are proto-galaxies that were ejected out from their parent galaxy and contain mostly very low mass subatomic particles. What light they do
emit travels at very high velocities and we discern this as a high redshift.
I thought all light traveled at the speed of light? You lost me with the comment about "What light they do emit travels at very high velocities"?
Yeah, this is something that has taken me a long time to wrap my mind around so I don't know if this will make sense and I'm unsure as to its
overall accuracy and relevance. I try to use terms accurately as per their definitions like acceleration, velocity and speed so as to not add
confusion.
According to relativity light travels at 'c' as witnessed by an observer from that
inertial frame of reference. The same light will be
observed traveling at the same velocity 'c' according to any number of observers each from different
inertial frames of references all moving
in different directions, velocities and/or accelerations. The light's source and the observers velocities/accelerations do not add or subtract to the
velocity of light so 'c' remains constant.
This only makes sense to me if light has a myriad of potential velocities but only one velocity will be seen by each observer from that
inertial
frame of reference thus making it a constant. After thinking about the Doppler effect of light it appears that an observer can also determine the
velocity of the light's source. If this is the case then light has two discernible velocities that can be measured from each
inertial frame of
reference, the original velocity from the source (v^0) and the observed velocity (c).
I
underlined "inertial frame of reference" because this term is specific in its meaning with relativity. There are no points which are truly
at rest, everything is in motion, things only appear to be at rest. So your personal "inertial frame of reference" means the point at which you are
moving at a velocity (v) in the direction (x) and accelerating at a rate of (a), and no two will ever be the same.
The velocity of light (c) is used to measure time as well as distance and both of these are effected by acceleration, gravity being considered an
acceleration, but this effect can only be noticed by an outside observer (comparative differential). Inside of our 'gravity well' time and distance
appear normal but outside of it we see large differences in the Doppler effect of light and distance distortions due to different accelerations and
time should also be distorted. Earth's 'gravity well' is effected by the Sun and the Sun's 'gravity well' is effected by our galaxy.
Perhaps the center of the Milky Way effect all the stars within this galaxy creating a galactic 'gravity well'. For the most part velocities,
distance and time within our galaxy would appear normal as observed from inside the Milky Way but this changes when we look at other galaxies.
I agree that the redshift of light from another galaxy does relate to its velocity but I was asserting that the total mass of that galaxy (its
'gravity well') will also effect the amount of redshift. To put it differently, gravitational acceleration effects the observed 'redshift' similar
to velocity so if the total mass of a galaxy is added to its distance and redshift then maybe a more accurate Universal model can be made.