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Three discrete spectral lines occur at angles of 10.0°, 13.6°, and 15.0°, respectively, in the first-order...

Three discrete spectral lines occur at angles of 10.0°, 13.6°, and 15.0°, respectively, in the first-order spectrum of a diffraction grating spectrometer.

(a) If the grating has 3750 slits/cm, what are the wavelengths of the light?

λ1 =  nm (10.0°)
λ2 =  nm (13.6°)
λ3 =  nm (15.0°)


(b) At what angles are these lines found in the second-order spectra?

θ =  ° (λ1)
θ =  ° (λ2)
θ =  ° (λ3)
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