A light emitting diode emits light when:
A)electrons are excited from the valence to the conduction band
B)electrons from the conduction band recombine with holes from the valence band
C)electrons collide with atoms
D)electrons are accelerated by the electric field in the depletion region
E)the junction gets hot

Question

Quizplus · Accepted Answer

Electrons from the conduction band recombine with holes from the valence band, causing energy to be released in the form of light. This is the principle behind the operation of a light emitting diode (LED).

A Light Emitting Diode Emits Light When