AST201H1 Lecture 3: Relativity part 2
15 Jan 2019
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Time dilation: when someone is moving relative to you, their clock will seem to be running slower. Not only does time slow down, but also length. Things get squished (compressed) when something is moving faster. A stick can look more compressed to an observer not holding the stick, while the person holding it sees the stick normally. If you move closer to the speed of light, then the effect is larger. Since we agree on the speed of light, then there is a disagreement on the length and time. Neither is right but both are real for the person as they are in different time frames. If you have two observers in a different frame, both of them see the other"s clock as slower than their own. They are related not separate, they are connected by the speed of light. The twin paradox not a paradox but appears that way at first.
