CHEM 31X Lecture Notes - Lecture 4: Wave Function, Current Meter, Bohr Model
20 Aug 2016
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Photoelectric effect: apply voltage to kick off electron, could measure intensity of electrons (current meter, plot ke vs. frequency. H is slope: above threshold frequency, if you increase intensity, you get more electrons come out, they have the same speed. Rydberg"s spectroscopy: atoms in gas phase absorb most of wavelengths of light, emits discrete wavelengths. Absorption = light source to sample to prism to detector. 90 angle prism (90 degrees to minimize noise from white light detector: can be done with atoms in any phase. Bohr"s model: planetary model = heaviest particles in middle with surrounding energy orbits. =-rh negative value because energy released find wavelength by e =hc/ find radius r = : at lower energy levels, relative distance between energy levels decrease. De broglie wavelength of electron (use typical speed of electron in atom wavelength and radius are close for large objects wavelength negligible because way too small for size of baseball.
