CHEM 11a Lecture Notes - Lecture 28: Electron Microscope, Radial Distribution Function, Werner Heisenberg
16 Nov 2016
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Document Summary
Some properties of light are best described by considering light as a wave. A wave is a progressive, repeating disturbance that spreads through a medium from a point of origin to more distant points. Light is comprised of electromagnetic waves (or electromagnetic radiation) a type of energy originating from fluctuations in electric and magnetic fields propagated over distances. Unlike sound waves, electromagnetic radiation can travel through empty space. Different colors of light (wavelengths) can have an infinite range of intensity (amplitude) . Number of cycles that pass through a stationary point in a given time interval. Units of cycles per second (or just s-1) Another common unit is the hertz (hz): Regardless of its wavelength, low amplitude light is dim . The product of a wave"s length and its frequency is its . For a light wave traveling in a vacuum, the product of and is a constant value, c . = c = 3. 00 108 m s-1.
