The energy gap between the valence and conduction bands in a certain semiconductor is 1.25 eV. What is the threshold wavelength for optical absorption in this substance?
A)599 nm
B)639 nm
C)959 nm
D)873 nm
E)995 nm

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The Answer of The energy gap between the valence and conduction bands in a certain semiconductor is 1.25 eV. What is the threshold wavelength for optical absorption in this substance?
A)599 nm
B)639 nm
C)959 nm
D)873 nm
E)995 nm

The Energy Gap Between the Valence and Conduction Bands in a Certain