Monochromatic Light from a He-Ne Laser (λ = 632

question 13

Multiple Choice

Monochromatic light from a He-Ne laser (λ = 632.8 nm) is incident on a diffraction grating containing 5000 lines/cm. Determine the angle of the first-order maximum.

• A) 18.4°
• B) 39.2°
• C) 14.6°
• D) 27.7°
• E) 13.9°

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