PCS 181 Lecture 1: PCS 181 Unit 1
19 Feb 2017
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Document Summary
Starlight is the star"s surface temperature, chemical composition, motion, pressure, magnetic fields, etc. Waves will have an electric part and magnetic part. Light hitting something with energy is called a photon. Light: mutually perpendicular oscillating electric and magnetic fields. Light moves in wavelike pattern at a speed of c= 3x108 m/s. Light behaves both like a wave and a particle. Photons: bundles of energy light as a particle. Ultraviolet, x-rays, and gamma rays are short but dangerous (shorter than visible spectrum) The shorter the wavelength, the greater the damage to you. Frequency: f= # of wave peaks passing a given point each second. H2 emission spectrum is 2 blue (hydrogen gamma and hydrogen beta), 1 green (hydrogen delta), If energy is added to system, electron transfers to higher orbit. When an electron goes to a lower state, a photon is released. When an electron goes to a higher state, a photon is absorbed.
