PHYS 132 Lecture Notes - Lecture 1: Photon, Electronvolt, Carina Round
14 Oct 2016
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Resonance: energy is transferred to a system by making it vibrate at its natural frequency resulting in large amplitude standing waves examples: guitar strings, bridges, swings, wine glasses. Order of electromagnetic spectrum: source accelerating charged particles radioactive. Monkeys in virginia use x-ray guns lowest to highest frequency and energy. Doppler effect: apparent change in frequency due to relative motion. Doppler shift for light: blue shift = object moving towards red shift = object moving away. Standing wave: two identical waves traveling in opposite directions in the same medium interfere. Fundamental wave: lowest frequency (f 1), 1 =8. 0m. Visible light: 400 nm (violet) 700 nm (red) Slope = planck"s constant (h) (ephoton = ei - ef) Hadrons made of quarks, leptons don"t break down further antimatter = same mass, opposite charge alpha particle = helium nucleus (2 protons and 2 neutrons) positron = anti-electron = positive electron.
