問題詳情

55. Monochromatic light is normally incident on a diffraction grating that is 1 cm wide and has 12,500 slits. The first order line isdeviated at a 30° angle. What is the wavelength of the incident light?
(A) 300 nm
(B) 400 nm
(C) 500 nm
(D) 600 nm
(E) 1000 nm

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