A photovoltaic cell contains a p–n junction that that converts
solar light to electricity. An optimum semiconductor
would have its band-gap energy matched to the wavelength
of maximum solar intensity at the Earth’s surface.
(a) What is the color and approximate wavelength of maximum
solar intensity at the Earth’s surface? Refer to the
figure for Problem 12.102.
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Master Electromagnetic Spectrum with a bite sized video explanation from Jules Bruno