Re: The train and the light inside.

"Spaceman" <Realspace@xxxxxxxxxxx> wrote in message news:4eqdnWApaOuHymbeRVn-iA@xxxxxxxxxxxxxx
We have {observer (a)} standing next to the train tracks
observing from outside the train.
We also have {observer (b)}that is sitting in the front of the train.
The train is moving at 0.5c with reference to {observer (a)}
Inside the train, a light is turned on at the back of the train.
(lightsource D)
If it travels to the front of the train and hits {observer (b)}
so...

What speed would the light be doing when it hit the front
of the train according to {observer (a)}?
and..
What speed would the light be doing according to {observer (b)}
How can both be measuring this light to be c?
Please show the math that will show that both (a) and (b) would
measure c for the light if you prefer to use math at all.

The equivalent experiment has been done; both
observers see the speed of light as c. Therefore,
since the math chosen to model situation must agree
with the empirical data, the naive summation of
velocites must be discarded. The model that works
is the SR one.

So, observer (a) sees the speed of the light as

(0.5c + c)/(1 + 0.5c*c/c^2) = 1.5c/1.5 = c

Were you expecting anything different?


.

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