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NĐGK
Group Title
Calculate the wavelength of a proton with energy 2.45 eV. what's different between proton and photon formula? can anyone tell me? thank you
 one year ago
 one year ago
NĐGK Group Title
Calculate the wavelength of a proton with energy 2.45 eV. what's different between proton and photon formula? can anyone tell me? thank you
 one year ago
 one year ago

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Frostbite Group TitleBest ResponseYou've already chosen the best response.0
Are you sure you are going to calculate the energy of a proton and not a photon? A "proton" is atomic materiale. a "photon" however is a light particle and can for an example be admitted when an electron falls to a lower energy state.
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
one formula (planck's) is for massless particles (i.e. photons) the other (deBroglie's) is for things with mass... so, for this question, find the velocity, v, of the particle: \[K.E.=\frac{ 1 }{2 }mv ^{2}\] then use the deBroglie equation: \[\lambda=\frac{ h }{ mv }\] wavelength is in meters, velocity in m/s, mass in Kg.
 one year ago
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