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  1. After the first photons of light are produced, which process is responsible for amplification of the light?

  2. A.
    Blackbody radiation
    B.
    Stimulated emission
    C.
    Planck's radiation
    D.
    Einstein oscillation

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    Answer : Option B

    Explanation :

    The word "laser" is actually an acronym for light amplification by stimulated emission of radiation. Atoms or molecules of the active medium that have been excited to a higher energy level are stimulated by a passing photon to relax to a lower energy level and emit a photon that is indistinguishable from the passing photon, thereby increasing the number of photons like the incident one.


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