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Uejji (November 30, 1999 at 12:00 am)
It would depend on the bomb's frame of reference. Is the bomb on the track or on the train? These are two separate frames of reference, just like with the man and woman.
owenmalta (November 30, 1999 at 12:00 am)
Ah ok, my mistake was that of assuming that the lightning strikes were initially simultaneous for both reference frames (which cannot be the case, right?). Makes sense now :) thanks to all for the clarifications!
Pulsar89 (November 30, 1999 at 12:00 am)
(cont)
To formulate things a bit more formal: The simultaneity of two events happening at two SEPARATE locations (front and rear of the train) can be different for two different observers. That's relativity.
But the simultaneity of two events happening at the SAME location (the woman) is always the same for every observer (herself or the man). That's logic.
Pulsar89 (November 30, 1999 at 12:00 am)
"he will see the front beam hit her before the rear"
correct.
"From her point of view, both beams will reach her at the same time"
No. You see, that would lead to a contradiction. Let's play a James Bond villain: place a bomb underneath the woman. If both beams hit it at the same time, the bomb goes off. If they don't, nothing happens. Now, does the bomb go off, yes or no? It can't be both. In other words, the man and woman have to draw the same conclusion: the front beam always hits her first.
brodighiero (November 30, 1999 at 12:00 am)
Lol my professor showed this exact video in my Black Holes class, it's correct.
techphy100 (November 30, 1999 at 12:00 am)
Well not exactly how he invented television, but his theories led to it.
techphy100 (November 30, 1999 at 12:00 am)
t0--t1
\t1 (spacetime-the light carrying the colors of the event is going to your eye and travelling in space and reaches you in a certain time over the distance of your position, the mans distance stays the same, but the womans distance is constatly changing so her views of the event will be messed up). this is how he invented television!!
techphy100 (November 30, 1999 at 12:00 am)
For example, Einstein said 'time, past and future' doesn't exist, its only created by man. What he means what you see has already happened but will happen because you havent seen it yet. When you see someone do something, they have already done it, relative to your position to the speed of light, and who sees it first is future relative to who sees it second. so future and the past dont exist, in these terms. i have many more explanations relative to einstiens.
techphy100 (November 30, 1999 at 12:00 am)
your missing vector quantity and your thinking in terms of the train moving relative to the lightning strike, its seeing the event happen is also traveling to your eye at the speed of light. at time t0, she is 0, at time t1 she is +1 which makes the front bolt 0 and the rear bolt +2. but he is not moving so his distance is the same left side and right side, at t0 he is 0, at t1 the light is going to him from the t0 point(space time) and he is still, so both lights will reach at the same time.
RatkoUSA (November 30, 1999 at 12:00 am)
The Simms experience simultaneity on a bullet train as envisioned by Albert Einstein, somehow fascinating, yet very creepy. |
