When a Diffraction Grating Having 5000 Lines/cmis Illuminated by Monochromatic $47.2 ^ { \circ }$

question 133

Multiple Choice

When a diffraction grating having 5000 lines/cmis illuminated by monochromatic light, the angle between the central maximum and the fourth order maximum is $47.2 ^ { \circ }$ . What is the wavelength of the light?

• A) \(367 \mathrm {~nm}\)
• B) \(637 \mathrm {~nm}\)
• C) \(183 \mathrm {~nm}\)
• D) \(138 \mathrm {~nm}\)

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