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Unformatted text preview: 44. The angular location of the mth order diffraction maximum is given by mλ = d sin θ.
To be able to observe the fifthorder maximum, we must let sin θm=5 = 5λ/d < 1, or
λ< d 100 nm / 315
.
=
= 635 nm.
5
5 Therefore, the longest wavelength that can be used is λ = 635 nm. ...
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 Spring '08
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 Physics, Diffraction

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