AST201H1 Lecture Notes - Lecture 3: Special Relativity
26 Feb 2020
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AST201H1 Full Course Notes
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The twin paradox light year sounds like time, but its not; light year = distance light travels in a year. Consider a set of identical twins, zoomer and stayer. Zoomer gets in a spaceship and travels to a star far from earth at 60% of the speed of light, then comes home. Each twin sees the other one as moving, so she can claim that the other twin"s clock is running slower than her own. So, when the twins reunite on earth, each one expects the other one to be younger than herself. The trick to resolving the paradox is to take careful account of the entire trip. Observers at the same location, in the same. Textbook notes s2. 3 the reality of space and time. The absolutes of relativity the laws of nature are the same for everyone. The speed of light is the same for everyone. Time runs slower in reference frames moving relative to you.
