Differaction & Plancks Constant +0.1/0.5 points | Previous Answers My No This qu

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Differaction & Plancks Constant

+0.1/0.5 points | Previous Answers My No This question is designed to give you some familiarity with the relationships among color, wavelength, frequency and photon energy in light. In addition, it will illustrate the usefulness of using the electron volt scale as a way of quantifying such energy values In the table below, select the correct wavelength that corresponds to the color, and then calculate the frequency f in terahertz (THz), photon energy E in joules (J) and photon energy in electron volts (eV) for that wavelength. You will need to look up physical constants in your text. Color (nm) f (THz) E (J) E (eV) 635 YELLOW 568 522 454 424 RED GREEN BLUE VIOLET Note that for energy, the numbers in electron-volts are something like "2.3" instead of a tiny number in joules like "3.7x10-18. Most physicists use eV units for energies of atomic and nuclear quantities. (Recal an electron-volt is the energy acquired by one electron when it moves through a potential difference of one volt, and 1 volt times 1 coulomb is equal to 1 joule.) Submit Answer Home My Assignments Extension Requesf WebAssign 4.0 1997-2003 by North Carolina State University. Portions 2003-2015 by Advanced Instructional Systems, Inc. All rights reserved.

Explanation / Answer

??=c where ? is the wavelength, ? is the frequency and c is the speed of light.

v=c/ ?

v=3*10^8/635*10^-9 Hz

v=0.00472*10^17

v=472*10^12

v=472THz

E=hc/L

E=6.626

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