Universal Constants [OFF TOPIC ]

> If the speed of light is constant, then what is the speed of light

The measured speed of light is independent of the motion of the source or of
the observer. That's one of the underlying postulates of Special Relativity.
So the photon would measure the speed of light to be the speed of light.

On the second point: the photon would believe itself to be standing still: The
other basic postulate of Special Relativity is that Absolute Motion can not be
detected. So how would the photon detect it's own motion except relative to
something else? "Am I moving at light speed past all these objects? Or are
they moving at light speed past me? I can't tell."

> For example, it takes a finite time for a photon to go

Finite time as measured by us, not moving at light speed. Remember that
measurement is relative.

> but since the photon is travelling at the speed of

Length contraction. As you approach the speed of light lengths along your
direction of motion contract and at the speed of light they become zero.

> time stands still, and

Time dilation and you got it backwards. You age less as you approach light
speed and so at light speed you would experience zero time passing. So zero
amount of time not infinite amount of time. Note this is zero time in the
photons frame of reference.

> which contradicts the fact that it does get to B.

Nope: It's all relative. Repeat until you feel calmer.

Ignore most of what I said. I got some of it wrong.

:-(

But I stick by the calming effects of repeaing to yourself that everything is
relative.

> Ignore most of what I said. I got some of it wrong.

Actually, most of what you said was reinforcing my point!

> :-(

What I wrote down seems to calm me down. That is usually my train of thought
as I lie down trying to go to sleep (as long as I'm sober, that is;))

> Steve