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The following graph is pictorial representation of _____________

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in Engineering Physics II by (679k points)
The following graph is pictorial representation of _____________

(a) Spontaneous emission

(b) Spontaneous Absorption

(c) Stimulated emission

(d) Stimulated Absorption

This question was addressed to me in my homework.

This interesting question is from Interaction of External Energy with the Atomic Energy States topic in division Laser of Engineering Physics II

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Correct answer is (d) Stimulated Absorption

To explain I would say: The diagram shows that when a photon from the incident radiation, having energy E2 – E1, interacts with the atom in the ground state, the atom gets exited to a higher energy state. This is known as stimulated absorption.

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