EMSpectrum-ACalculationInvestigation电磁频谱的计算研究.docx

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1、.HON 203 Lab 2EM Spectrum - A Calculation InvestigationYou are given the following two equations that express the relationships between the speed, the wavelength, the energy and the frequency of light: c = l nspeed = wavelength x frequencyE = hnenergy = Planck's constant x frequency1. Check the

2、equations above and show that the units match on each side of the equations.2. Manipulate both equations to solve for energy (E) as a function of wavelength (l) and fundamental constants. Show each step. Show that the units match on each side of the resulting equations.3. Given a photon's wavele

3、ngth, frequency or energy in the chart below, use the above equations to solve for the other two (in the units indicated). Use the useful constants page if you need to. 4. Summarize what you have learned about light and the relationship between its energy, frequency and wavelength.Wavelength (m)Freq

4、uency (Hz)Energy (J)ElectromagneticRadiation Range0.0017.0 x 10135.0 x 10-72.0 x 10-151.2 x 1022Useful Constants· speed of light (c) = 3.0 x 108 m/s · Planck's Constant (h) = 6.626 x 10-34 Joules second · Charge of an electron (q) = 1.602 x 10-19 coulombs Useful Units· freque

5、ncy = cycles/second (Hz) · wavelength = length (m) · volt = a unit of potential of electric field, such that that it takes 1 Joule to push a charge of 1 Coulomb across 1 voltConversion Factors· 1 angstrom (A) = 1 x 10-10 meters (often used for the optical region of the spectrum) · 1 KeV = 1,000 eV = 1.6 x 10-16 Joules :

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