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OpenStudy (anonymous):
A helium-neon laser (λ = 738 nm) is used to calibrate a diffraction grating. If the first-order maximum occurs at 22.8°, what is the line spacing?
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OpenStudy (anonymous):
d *sin(θ) = m*λ d = m*λ/sin(θ) d =1*7.38 x 10^-7/sin(22.8) d =1.904439527e-6
OpenStudy (jamesj):
Looks about right!
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