In this lesson, we will learn how to describe the energy bands of insulators, conductors, and semiconductors and find the energy changes of band transitions.
Sample Question Videos
Worksheet: 4 Questions • 1 Video
A valence electron in a crystal absorbs a photon of wavelength 0.300 nm. The energy from this photon is just enough energy to allow the electron to jump from the valence band to the conduction band. What is the magnitude of the energy gap?
The collector current of a transistor is 4.6 A for a base current of 5.4 mA. What is the current gain?
What is the longest possible wavelength of a photon that can excite a valence electron into the conduction band across an energy gap of 0.70 eV?