ASTR 170B2 Lecture Notes - Lecture 11: Gravitational Energy, Potential Energy, 30 Foot Fall
4 Oct 2017
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The familiar phases of matter interact with light differently in ways that depend on atomic and molecular properties. Every atom has a unique set of energy levels resulting in spectral nger print. Molecules have additional energy levels because they can vibrate and rotate. Water vapors impact on the transmission of earths atmosphere. What can we learn about a star or planet from studying its light and spectrum. Which of the following would be true when comparing gamma rays and radio waves: radio waves would have a longer wavelength and travel the same speed as gamma rays. Light emitted by an object moving toward you will have its wavelength shortened (blue shift) Light emitted by an object moving away from you will have its wavelength lengthened (red shift) Light emitted by an object moving perpendicular to your line of sight will not show a change in wavelength. Only motion along your line of sight produces a shift in wavelength.
