PCS 181 Lecture Notes - Lecture 1: Emission Spectrum, Photon, Kelvin
18 Sep 2017
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Unit 1: astronomical information is transmitted by. Starlight (the star"s surface temperature), chemical composition, motion (30km a second), pressure, magnetic fields, etc: photon , wavelength : distance between two peaks. Wednesday, january 14, 2015: light as a wave electro magnetic spectrum, wavelength represented as . Bumble bees can see what we can"t see because they can sense different wave length. Most dominant wave length (have yellowish, greenish) from sun: light: Changing mutually perpendicular oscillating electric and magnetic fields. Moves in wave like pattern at a speed of c=3*10^8 m/s. Tachyons: theoretical faster-than-light particles. (in other universe, only exists in theory, because it"s impossible for us to get to other universes yet. ) Wednesday, january 14, 2015 wavelength is represented as the following, 1 nanometer = 1nm = 1 m = 1 x 10^- Frequency = f (number / time unit: frequency of wave. = number of wave peaks passing a given point each second.
