The hydrogen spectrum has a red line at 656 nm, and a blue line at 434 nm. What is the first order angular separation between the two spectral lines obtained with a diffraction grating with 5000 rulings/cm?
A. 7.7 degrees
B. 16.6 degrees
C. 6.6 degrees
D. 3.2 degrees
E. 19.2 degrees
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