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    Physics for Scientists and Engineers Study Set 4
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    Exam 40: Molecules and Solids
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    The Energy Gap Between the Valence and Conduction Bands in a Certain
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The Energy Gap Between the Valence and Conduction Bands in a Certain

Question 35

Question 35

Multiple Choice

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

Correct Answer:

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