A Diffraction Grating with 396 Lines/mm Is Illuminated with Light $343 \mathrm {~nm}$

question 112

Multiple Choice

A diffraction grating with 396 lines/mm is illuminated with light of wavelength $343 \mathrm {~nm}$ . What is the angular separation between the two second-order bright fringes?

• A) \(32.9 ^ { \circ }\)
• B) \(31.5 ^ { \circ }\)
• C) \(15.8 ^ { \circ }\)

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