gmf_lecture1 - The Art of Estimation Physics The...

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The Art of Estimation Physics The Art of Estimation Physics Patrick Diamond, George M. Fuller, Tom Murphy Department of Physics, University of California, San Diego I . “Nat ur al Uni t s” Ph 2239 also known as
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“use sloppy thinking” Richard Feynman : “never attempt a physics problem until you know the answer”
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“Natural Units” In this system of units there is only one fundamental dimension, energy . This is accomplished by setting Planck’s constant, the speed of light, and Boltzmann’s constant to unity, i.e., By doing this most any quantity can be expressed as powers of energy, because now we easily can arrange for To restore “ normal ” units we need only insert appropriate powers of of the fundamental constants above
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It helps to remember the dimensions of these quantities . . . or example, picking convenient units ( for
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length units Figure of merit for typical visible light wavelength and corresponding energy
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– from now on measure temperature in energy units for example . . . but I like
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This note was uploaded on 02/12/2012 for the course PHYSICS 104 taught by Professor Staff during the Fall '10 term at Rutgers.

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gmf_lecture1 - The Art of Estimation Physics The...

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