Re: On the light-like interval
- From: "Jeckyl" <noone@xxxxxxxxxxx>
- Date: Sat, 7 Apr 2007 20:28:13 +1000
<jt64@xxxxxxxx> wrote in message
news:1175937362.619148.20970@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On 7 Apr, 02:51, "Bill Hobba" <rubb...@xxxxxxxx> wrote:
"Phil" <cms...@xxxxxxxxxxxxx> wrote in message
On Apr 6, 5:58 pm, "Jeckyl" <n...@xxxxxxxxxxx> wrote:
"Phil" <cms...@xxxxxxxxxxxxx> wrote in message
news:1175903706.524698.28130@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Recently I came to the realization that the light-light interval is
an
interval whose end points describe the same point in space-time. So
it would seem that a light pulse is centered on a unique point in
space time. What troubles me is that, for every or any inertial
frame, there is an infinite number of "events" (coordinates) which
drive a stake into this same space time location. This lack of
uniqueness of a single event for every space-time location troubles
me. What am I missing?
Its just the one location as 'seen' from different points of view
The number of points of view makes no difference to the uniqueness of
the
location.
I don't think you understood what I meant. Say I have set up my own
inertial lab. I measure the movement of light in my frame. So there
is a series of events, between each is an space-time interval of zero,
which means that ALL of my measurements have staked the same location
in space-time. So I can drive an infinite number of stakes into the
same space-time location. In this sense, its not a unique location
for a specific event.
All you are alluding to is something trivially obvious - points of zero
distance using the Minkowsi metric do not have zero distance using the
Euclidian metric - such follows immediately from their definitions. As to
the physical implications - I suspect all you will arrive at is
meaningless
semantics.
So you try to tell that space events like a planet blocking the way of
a ship is meaningless, from point of causuality.
There was no mention of ships and planets in the post .. what are you
talking, and how is it related to what was being discussed?
.
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