p36_067 - 67(a and(b Dividing Eq 36-12 by the wavelength we...

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67. (a) and (b) Dividing Eq. 36-12 by the wavelength, we obtain N = L λ = d λ sin θ =39 . 6 wavelengths. This is close to a half-integer value (destructive interference), so that the correct
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