What is the energy (in eV) of a photon of visible light that has a wavelength of 500 nm ?
E = ?
E = ?
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Use E = hc/lambda
E = (6.62 x 10^-34 x 3 x 10^8)/500 x 10^-9
E = 3.972 x 10^-19 J
to convert to eV we simply divide the Joules value by 1.6 x 10^-19 to give
E = 3.972 x 10^-19/1.6 x 10^-19
E = 2.48 eV
E = (6.62 x 10^-34 x 3 x 10^8)/500 x 10^-9
E = 3.972 x 10^-19 J
to convert to eV we simply divide the Joules value by 1.6 x 10^-19 to give
E = 3.972 x 10^-19/1.6 x 10^-19
E = 2.48 eV