A photodetector used to detect the wavelength of 1700 nm, has energy gap of about
0.073 eV
1.2 eV
0.73 eV
1.16 eV
The energy gap between conduction band and the valence band is of the order of 0.7 eV. Then it is
an insulator
a conductor
a semiconductor
an alloy
C.
a semiconductor
It is a semiconductor,
For Ge, ΔEg = 0.72 eV
For Si, ΔEg = 1.1 eV