AST201H1 Chapter Notes - Chapter S2: Infinite Mass, Time Dilation, Length Contraction

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST201H1
• Professor: Michael Reid

Document Summary

Universe consists of matter and energy moving through space with the passage of time. Einstein developed his theory of relativity in two parts: special theory of relativity: einstein"s theory that describes the effects of the fact that all motion is relative and that everyone always measures the same speed of light. Useful in understanding expansion and the fate of the universe, and black holes. Einstein developed his theory using thought experiments: thought experiments: experiments that could be carried out in principle but that would be very difficult in practice. Allow us to think through the consequences of simple ideas/statements. 1670 km/hr relative to the surface of the earth. Theory of relativity says that measurements of motion, time, and space, make sense only when we describe whom or what they are being measured relative to. Two absolute things in the universe: the laws of nature are the same for everyone.