AST201H1 Lecture 3: AST201 - Lecture 3

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST201H1
• Professor: Bryan Gaensler

Document Summary

Time dilation; if someone is moving relative to you, their clock will appear to run slower due to the di erent frames of reference. Your clock will always be the fastest clock and the person relative to you"s clock will always be slower. To me and the other person in our own frame of reference, time is normal within our frames of reference, we are aging normally. If i am travelling in a space ship from earth to alpha centauri, to those on. Earth, the ship will appear shrunken; to me, the ship is normal, but earth, Alpha centauri, and the distance between the two appear shrunken. Both time dilation and length contraction are the same things this will be discussed later. Consider a set of identical twins, zoomer and stayer. Zoomer gets in a spaceship and travels to a star from earth at 60% of the speed of light, then comes home.