PHYS 190 Lecture Notes - Lecture 8: False Color, Hydrostatic Equilibrium, Positron
27 Nov 2020
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Non optical astronomy: many objects radiate strongly outside optical wavelengths, two examples. Stellar hydrostatic equilibrium: stars all gas: what holds up their incredible weight, at greater depths, a greater weight lies above, hence pressure (therefore temperature) Internal heat source generates gas temperature and pressure must go up: thermonuclear fusion in the stars core is the energy source. Fusion in the sun: produces about 10,000 years of global electricity generation every second, output equivalent to about one billion 100-megaton fusion bomb every second. Fusion & fission: nuclear not atomic": fusion, fission, pickering power station, lake ontario, fusion & fission are due to nuclear physics. Involves nucleus, not electrons: chemistry involves electrons, that"s atomic" physics. Properties: plasma: the 4th state of matter. Jacques and julie make their annual pilgrimage from frigid quebec to sunny florida every february. 30 in quebec, 30 in florida: temp has gone up so has the pressure.
