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Oscillations — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsOscillations1 Mark
Question
Which of the following examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion?General vibrations of a polyatomic molecule about its equilibrium position.
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Answer

A polyatomic molecule has many natural frequencies of oscillation. Its vibration is the superposition of individual simple harmonic motions of a number of different molecules. Hence, it is not simple harmonic, but periodic.

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