(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A laser is used to illuminate a diffraction grating that has spacing of 637 lines per mm. The grating sits 11.6 cm in front of a screen. Find the distance to the first and second maxima (y1 and y2) for the laser wavelength of 643 nm. Express your answers in mm.

2. Relevant equations

wavelength = (s/m)(y_{m}/sqrt(L^{2}+y_{m}^{2}))

3. The attempt at a solution

s = 1/637 = .00156 mm

L = 116 mm

wavelength = 643 X 10^{-6}mm

I tried solving this equation for y_{m}, but the answer I got was wrong. Is there another way to do this problem?

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# Homework Help: Diffraction grating

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