A diffraction grating that contains 650472 lines/m is illuminated by monochromatic light (λ=632.8 nm) from a helium-neon laser directed perpendicular to the surface of the grating. What is the angle for the second order maxima to occur?

55°

24°

45°

48°

Question

A diffraction grating that contains 650472 lines/m is illuminated by monochromatic light (λ=632.8 nm) from a helium-neon laser directed perpendicular to the surface of the grating. What is the angle for the second order maxima to occur?
 	
	
55°
	
24°
	
45°
	
48°

anonymous · Answer

@Johnbc

anonymous · Answer

I feel like there was an equation for this that went in the order of something like this$$n \lambda = d \sin(\theta)$$

anonymous · Answer

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anonymous · Answer

so how do I enter everything into the equation? @Johnbc