GEOS 170A1 Study Guide - Comprehensive Final Exam Guide - European Space Research Organisation, Earth, Lithosphere
20 Nov 2018
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Document Summary
Goal of science: to discover patterns in nature, to use the knowledge to predict. Today: electromagnetic radiation (emr, doppler effects - shifting of spectral lines, early observations of shif, hubble plot, big bang theory. Emr (electromagnetic radiation: from google: emr refers to the waves of the electromagnetic field, propagating through space-time, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, x- rays, and gamma rays: white light = all colors, spectrum (wavelength + frequency, shorter wavelength = high energy, longer wavelength = low energy, elements in our sun. Doppler effect: change in frequency or wavelength as thing emitting waves moves relative to stationary observer, vesto noticed that galaxies were red shifted. In other words, their light spectra were shifted toward the red end of the spectrum. When the observer and the source of light are moving away from each other, the light is shifted to longer wavelengths (redshifted).
