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:

Verified
Correct Answer:
Verified
Related Questions
Q30: A simple junction transistor consists of three
Q31: At room temperature (~295 K with kT
Q32: Suppose the first excited vibrational state of
Q33: The ionic bond forms because the atoms
Q34: The characteristic rotational energy, h<sup>2</sup>/8π<sup>2</sup>I, for O<sub>2</sub>
Q36: Metallic bonding is caused by<br>A)the sharing of
Q37: The binding energy of a molecule<br>A)is the
Q38: A material has an energy gap of
Q39: In its lowest quantum state, the energy
Q40: If a metal had a Fermi level