AST101H1 Lecture Notes - Lecture 11: Absorption Spectroscopy, Photon, Blueshift
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AST101H1 Full Course Notes
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There is iron and copper in the sun. A nucleus made of positively charged protons and neutral neutrons. Number of protons determines which element atom is composed of. Number of electrons equal to the number of protons in the nucleus. Number of neutrons can vary, but is roughly same as number of protons. Solid: atoms or molecules are held in a rigid structure. Liquid: atoms or molecules are stuck together, but can change their positions. Gas: atoms or molecules move around independently (surface of sun) Plasma: when a material is very hot, the electrons separate from the nucleus (interior of the sun) Light is a wave, but also a particle. Transmitted as photons: think of them as tiny bullets travelling at light speed. Each photon of a given color (or wavelength, or frequency) carries exactly the same energy. Determined by formula: energy = h x frequency. Where h is a tiny number (planck"s constant)
