White light is spread out into spectral hues by a diffraction grating. If the grating has 1 000 lines per cm, at what angle will red light (l = 640 nm) appear in first order?

a. 14.7°
b. 7.35°
c. 17.7°
d. 3.67°
e. 1.84°


D

Physics & Space Science

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