AST101H1 Study Guide - Midterm Guide: Tharsis, Vehicle Emissions Control, Thermostat

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AST101H1 Full Course Notes
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AST101H1 Full Course Notes
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; consists of bright emission line against a black background. Graph shows upward spike at the wavelength of each emission line. Atom in any cloud of gas are constantly colliding with one another, exchanging energy in each collision; some of the collisions result in the right amount of energy to bump an e- from lower to higher levels. When the e- falls back to lower level, it releases a photon of light (the emitted photon must have the same amount of energy that the electron loses specific wavelength/frequency) Graph shows a dip in intensity at the wavelength of each absorption line. The light bulb emits light in all wavelengths and the gas can absorb photons that have the right amount of energy needed to raise an electron form a low energy level to a higher one. Each element has a different set of lines. Ions also have different set of lines (ne++ different from ne+ and different from ne)

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