ASTR 103 Lecture Notes - Lecture 22: Planck Units, Fine Structure, Electroweak Epoch
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~ continuous spectrum: any body (ideal blackbody) that is at a temperature above 0 k. ~ emission spectrum: any low pressure gas that you place a high voltage across. ~ absorption spectrum: any low pressure gas placed between a blackbody and the observer. Best described the workings of the hydrogen atom one proton and one electron. Around the proton moving in orbits that are discretized (quantized) so that no intermediate orbits are allowed. A way to depict frequency (inverse of wavelength) versus intensity. Peak wavelength is inversely proportional to the temperature of the blackbody. Energy radiated by blackbody is proportional to the temperature to the 4th power. Second law: planets sweep out equal areas in equal times. First law: planets orbit sun in an ellipse with sun at one focus. ~ travel faster when closer, slower when farther. Third law: orbital period squared is proportional to semimajor axis cubed (p^2 = a^3)
