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Light! Physics! Help!

[From: ] [author: ] [Date: 11-08-15] [Hit: ]
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Light from a He-Ne laser of wavelength 994.6 nm is incident on a single slit. What is the minimum width for which no diffraction minima are observed? Answer in units of nm

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d * sin 90 = 1 * 994.6
--> d = 994.6 nm
1
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