When free electrons fall from the conduction band to the valence band,excess energy
A) is radiated in the form of heat and light.
B) is lost due to valence electrons.
C) is radiated in the form of sound.
D) is gained due to hole flow.

Question

Quizplus · Accepted Answer

When free electrons fall from the conduction band to the valence band, they release excess energy in the form of heat and light, a process known as radiative recombination. This is because the energy difference between the two bands is typically large enough to emit photons in the visible or near-infrared range. Options B, C, and D are not correct as they do not correctly describe the release of excess energy during recombination.

When Free Electrons Fall from the Conduction Band to the Valence