PCS 181 Lecture 6: PCS 181 Test 1 Review Notes
23 Feb 2017
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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.
