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Time Dilation

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by

Richard Datwyler

on 8 March 2017

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Transcript of Time Dilation

Time Dilation
Moving clocks run slow.
The hard part is noting which clock is moving.
Try to consider the background location, either the laboratory or the universe itself. These reference frames will be at rest. While the spaceships and particles will move around in them and run slow.
We define proper time (not as correct time) but at the time that is measured in this moving reference frame. (for they measure time in the same location according to their reference frame)
Proper time = measurement occurred at the same location in the reference frame
Dilated time = measurement occurred at a different location in the reference frame
Proper time is always shorter than dilated time.
A positron only has a life span of 0.1 ns. If traveling at a speed .8c what would be the life span of a positron as measured in the laboratory reference frame?
how far would it travel in the laboratory?
(otherwise it would be 2.4 cm)
How fast would it have to be going to make it 25 cm?
= .993 c
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