ASTRON 2B03 Lecture Notes - Lecture 16: Non-Inertial Reference Frame, Distant Star, Spacetime
6 Nov 2015
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Document Summary
Another clue (1910) came from understanding of the spectrum of light emitted when electrical current is passed through a gas (like in a neon sign). This reveals that only a few colours are actually present. Back to gravity: gravitational force decreases with distance, depends on the masses involved, all objects fall at the same rate, einstein"s special theory of relativity (1905) does not include gravity. It took einstein 11 more years to find a relativity theory that did. (general theory of relativity) Neils bohr explains colours emitted by hydrogen if only a few orbits are possible. General relativity (1916: all laws of nature are the same for observers variable, describing gravity. moving in an arbitrary way relative to one another, makes the curvature of space a physical. Consider a rocket ship so far out in space that gravitational forces are negligible. Astronaut says: the ball dropped towards the bottom of my spacecraft.
