ASTR-1010 Study Guide - Midterm Guide: Absorption Spectroscopy, Angular Diameter, Coronal Mass Ejection
2 Nov 2017
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Chapters 4: radiation and spectra, chapter 6: telescopes, and. White light separates into roygiv (red orange yellow green indigo violet) in equal proportions. Light and matter interactions: emission=gives off light, absorption=takes in light, transmission=light passes through, transparent objects transmit light, opaque objects block (absorb) light. Gamma ray x-rays ultraviolet visible infrared radio. Spectroscopy = analyzing light (intensity of light at each ) In graphical form: continuous spectrum = smooth curve, emission spectra = spikes, absorption spectra = dips. Celestial objects emit light at all wavelengths. Higher temperature objects emit more light at all wavelengths than cooler objects. Peak intensity of higher temperature objects has a shorter wavelengths than cooler objects. (max) = (3 x 10^6 k)/temperature of object. As a light source moves way from a person the light appears redder (longer ) As a light source moves towards a person the light appears blue (shorter )
