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if frequency is (1/sec), then why is wavenumber (1/cm) considered a unit of frequency?
It is considered the spatial representation of frequency, it in itself is not a fequency. However, you can obtain the the wavenumber by dividing the frequency by the speed of light. Observe,asdf1 said:if frequency is (1/sec), then why is wavenumber (1/cm) considered a unit of frequency?