ENTRANCE TEST – 2011 :: Discussion


22.What is meant by spontaneous emission of electrons in solids?
A.Electrons being emitted by the solids through photoelectric effect when irradiated with electromagnetic radiation
B.Incident electrons colliding with electrons in solids and releasing doubling the number of incident electrons
C.Electrons in solids are emitted without any external stimulus through radiation
D.Excited electrons going back to lower energy states immediately by releasing energy.
Answer:  Option  D
Explanation:

Tutorial Link:
Published by:Nimra Saeed

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