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Three discrete spectral lines occur at angles of 11.0°, 13.9°, and 14.9° in the first-order spectrum...

Three discrete spectral lines occur at angles of 11.0°, 13.9°, and 14.9° in the first-order spectrum of a grating spectrometer. (Assume that the light is incident normally on the gratings.)

(a) If the grating has 3 670 slits/cm, what are the wavelengths of the light? (Enter your answers from smallest to largest.)

nm
  nm
  nm

(b) At what angles are these lines found in the second-order spectrum? (Enter your answers from smallest to largest.)
°
°
°

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