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Multiplying Events???
A profound question.
Two parts: An
interval
and a
rope
.
An interval is the distance between two events.
Pythagoras said the distance is: A
2
+ B
2
= C
2
.
Einstein said the interval is: Time
2
- Distance
2
= Interval
2
.
For simultaneous events, dt
2
= 0.
The
minus
sign is why special relativity is tricky!
sweetser@alum.mit.edu
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