Re: help with question on the speed of light
- From: The Ghost In The Machine <ewill@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Sun, 11 Nov 2007 20:13:34 -0800
In sci.physics, panton_chrimaton@xxxxxxxxx
<panton_chrimaton@xxxxxxxxx>
wrote
on Sun, 11 Nov 2007 09:04:23 -0800
<1194800663.634854.299290@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>:
On Nov 10, 4:04 pm, "911review,org" <brad.te...@xxxxxxxxx> wrote:
OK,
heres a question i want answered...
If you are on a spaceship traveling at the speed of light,
and you turn on the "headlights",do they go anywhere ??
I doubt that this is a serious question - it is a joke told by Stephen
Wright.
Not at all. The main issue is of course how one gives
the ship enough energy to travel at lightspeed, in some
theories. (In SR, one can postulate "pseudolightspeed";
the amount of energy Newton predicts is required to
accelerate a particle or ship to lightspeed (1/2 mc^2)
will, in SR, accelerate the particle or ship to c/sqrt(2)
= 0.7071 c. Of course SR does not allow anything to
travel at lightspeed except light itself.)
[rest snipped by TGITM for brevity]
--
#191, ewill3@xxxxxxxxxxxxx
Murphy was an optimist.
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