ASTR-1010 Lecture Notes - Lecture 17: Continuous Spectrum, Blood Orange, Spectroscopy
2 Nov 2017
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Document Summary
Light is around us interaction with matter: giving us colors to see and warming us. Can be characterized by its energy, wavelength, and frequency. White light separates into roygiv (red orange yellow green indigo violet) in equal proportions. Transmission=light passes through: transparent objects transmit light, opaque objects block (absorb) light. Ex: throwing a pebble into a pond forming a moving ridge or swell. A wave carries energy, but does not carry matter. (wavelength) x f (frequency) = c (speed of light/3. 00x10^8 m/s) Human eye can only see a small range of wave lengths of light. Violet = 400 nm vs. red = 700nm. Beyond blue = ultraviolet light: shorter , higher energy, higher frequency. Beyond red = infrared light: longer , lower energy, lower frequency. Spectroscopy = analyzing light (intensity of light at each ) In graphical form: continuous spectrum = smooth curve, emission spectra = spikes, absorption spectra = dips.
