Monochromatic Light Is Incident on a Diffraction Grating That Is $75 \mathrm {~mm}$

question 65

Multiple Choice

Monochromatic light is incident on a diffraction grating that is $75 \mathrm {~mm}$ wide and ruled with 50,000 lines. The second-order maximum is seen at $32.5 ^ { \circ }$ . What is the wavelength of the incident light?

• A) \(202 \mathrm {~nm}\)
• B) \(806 \mathrm {~nm}\)
• C) \(403 \mathrm {~nm}\)
• D) \(605 \mathrm {~nm}\)

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