The Hydrogen Spectrum Has a Red Line at 656 Nm

question 1

Multiple Choice

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°
• B) 16.6°
• C) 6.6°
• D) 3.2°
• E) 19.2°

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