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Introductory Physics Homework Help
Problem with wave optics - diffraction grating?
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[QUOTE="winsticknova, post: 5018501, member: 544564"] [h2]Homework Statement [/h2] For your science fair project, you need to design a diffraction grating that will disperse the visible spectrum (400-700nm) over 30 degrees in first order. How many lines per mm does your grating need?[h2]Homework Equations[/h2] sin(Θ) = mλ/d y = Ltan(Θ) [B][/B] I'm pretty sure the only equation I need is the first one. [h2]The Attempt at a Solution[/h2] I'm not really sure where to start. I tried plugging in 400 nm and 700 nm in the first equation with m =1 and Θ=30°. But I don't get the right answer with either. If I use 400 nm, I get 1250 lines/mm which is close to the answer but not exact. The answer is 1230 lines/mm but I don't know how they get that answer. [/QUOTE]
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Introductory Physics Homework Help
Problem with wave optics - diffraction grating?
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