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 ($\lambda$ = 640 nm)appear in first order?
A)14.7$\degree$
B)7.35$\degree$
C)17.7$\degree$
D)3.67$\degree$
E)1.84$\degree$

Question

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The Answer of 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 ($\lambda$ = 640 nm)appear in first order?
A)14.7$\degree$
B)7.35$\degree$
C)17.7$\degree$
D)3.67$\degree$
E)1.84$\degree$

White Light Is Spread Out into Spectral Hues by a Diffraction