PHYS 183 Lecture Notes - Lecture 1: Electromagnetic Spectrum, Photon
3 Aug 2018
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Common to all lines of scientific inquiry. Distinct from: appeal to authority, superstition, advocacy. Develop a model or hypothesis that can be tested. Think of a new testable model to explain the facts, and test it again. If it succeeds, accept it as a theory but be willing to reject it if new data refute it. Time series: variations in the brightness of celestial signals. Spectra: colours of objects or energy distribution of light. Determines temp, composition, evolutionary state, motion towards or away. Newton showed that white light is really a spectrum of many colours. Wave nature is lambda, particle nature is energy e. Light travels at 3*10^8m/s in a vacuum f* = c.
