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Unformatted text preview: that make your calculation easier.) Problem #4 (2 pts) For each of the four materials introduced below, listed with their bandgap energies, calculate the shortest wavelength of light that will pass through the material without being absorbed. Give your answer in angstroms (1 Angstrom = 1E-10m) Aluminum antimonide, Eg = 1.63 eV Gallium phosphide, Eg = 2.24eV Zinc sulfide, Eg = 3.6eV Indium arsenide, Eg = 0.33eV Problem #5 (1 pt) Visible light falls between 0.4um and 0.7um. For each of the four materials given above, determine whether it is transparent or opaque to visible light. Remember that photons are not absorbed if the energy of the light is less than the bandgap. If it is not all or none, indicate roughly what color you might expect it to be when looking through it at a source of white light. x y z x y z (a) (b)...
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- Spring '09