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1. What is the frequency (wavenumber) of 1100 nm light of in cm-1, the units used in IR spectroscopy? 2. An echellette grating that

1.  What is the frequency (wavenumber) of 1100 nm light of in cm-1, the units used in IR spectroscopy?

  

2. An echellette grating that contains 1450 blazes /mm was irradiated with a polychromatic beam at an incident angle 48 o  to the grating normal. Calculate the wavelengths of radiation that would appear at an angle of reflection of 0 for 1st and 2nd order of reflection.

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