1.Electromagnetic waves 2.Wave media 3.Michelson & Morley CLASSICAL PHYSICS Light: Into the modern era.

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Presentation transcript:

1.Electromagnetic waves 2.Wave media 3.Michelson & Morley CLASSICAL PHYSICS Light: Into the modern era

LIGHTLIGHT Electric & Magnetic Vibrations `Electromagnetic Waves’ All travel at the same speed: 186,000 miles each second

Examples of Waves Waves -> Medium (what vibrates?)

????? Luminiferous Ether ?????? Name given to purported medium of light waves Must fill universe (we see light from stars) Must have no viscosity (planets do not slow down) Must be very stiff (light waves travel very fast) …. in summary Could define Absolute Motion relative to the Ether…

Michelson-Morley Speed of light same in all directions !!! Speed of light independent of Inertial Reference Frame !!! experiments fail to detect motion of the Earth in Ether

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