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Which of the following is the wavenumber of UV and Visible radiation?(a) 1 x 10^6 to 1.3 x 10^4 m^-1(b) 1 x 10^6 to 1.3 x 10^4 m(c) 13 – 27 m^-1(d) 1 x 10^6 to 1.3 x 10^4 m^2The question was asked during an interview for a job.This interesting question is from Spectral Method of Analysis in division Colorimetry and Spectrometry of Analytical Instrumentation

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Right CHOICE is (a) 1 x 10^6 to 1.3 x 10^4 m^-1

The EXPLANATION: Wave number of UV, Visible radiation is 1 x 10^6 to 1.3 x 10^4 m^-1. Wave number is the reciprocal of wavelength. So, the unit is m^-1.



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