write note on selection rule for spectrum
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A selection rule describes how the probability of transitioning from one level to another cannot be zero. ... A gross selection rule illustrates characteristic requirements for atoms or molecules to display a spectrum of a given kind, such as an IR spectroscopy or a microwave spectroscopy.
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A selection rule describes how the probability of transitioning from one level to another cannot be zero. A gross selection rule illustrates characteristic requirements for atoms or molecules to display a spectrum of a given kind, such as an IR spectroscopy or a microwave spectroscopy.
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