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Home Q & A Board Science-Related Homework Help Physics
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budsworth budsworth
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11 years ago
How do you find the wavelength of a photon whose energy is 0.01eV and then identify where the wavelength is in the electromagnetic spectrum
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wrote...
#1
11 years ago
convert to joules and use plancks constant for the energy of a photon

E = hf

then convert form freq to wavelength

then look up in a physics book the different wavelengths of light!
wrote...
#2
11 years ago
deBroglie
E = (h x c)/ lambda

E here in joules
Convert eV to Joules by multiplying by 1.6 x 10^-19
0.01ev = 0.01 x 1.6 x 10^-19
E = 1.6 x 10^-21J

Lambda = (h x c)/E
Lambda = (6.6 x 10^-34 x 3x 10^8)/1.6 x 10^-21 = 1.24 x 10^-4m
wrote...
#3
11 years ago
A photon is not considered a mass volume. A wavelength implies a wave.
A wave is a disturbance in a medium..A disturbance in a medium can only be caused by a mass volume.
Usually energy is defined as the product of a mass volume and its velocity squared.
Thus Energy applies  only to a moving mass..And the distance that a force moves..
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