NATS 1745 Lecture Notes - Lecture 14: Non-Inertial Reference Frame, Distant Star, Escape Velocity
15 Feb 2016
School
Department
Course
Professor
Document Summary
Lecture 14: general relativity continue from last week"s pdf thought experiment: what happens when you fall off a roof? principle of equivalence. Einstein"s description of gravity: mass causes the warping of spacetime experimental proof for gr: 1919 solar eclipse; advance of the perihelion of mercury. Before einstein: concepts of space + time are absolute and separate. After einstein: concepts of space + time are relative + intertwined. Before einstein: concepts of matter + energy are separate. After einstein: concepts of matter + energy are interchangeable. Special relativity works for reference frames that are inertial": straight line path, constant velocity (stationary --- velocity = 0) General relativity works for reference frames that are accelerated: straight line, speeding up, straight line, slowing down, along curved path. What would someone experience in gravitational free fall: they would not feel their own weight, they would feel their weight when they landed on the ground --- force of earth"s gravity o.
