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The absorption coefficient of Si at 1.5 eV is 10 cm! A thin piece of crystalline Si is exposed to light of energy 1.5 eV.

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The absorption coefficient of Si at 1.5 eV is 10 cm! A thin piece of crystalline Si is exposed to light of energy 1.5 eV. The Si is 7.5 microns thick. The reflectivity of the surface is 0.3. a. Calculate the fraction of incident light absorbed in the silicon. b. If the material system is changed to Ge, how would this change? Briefly justify your

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