69. What is the least number of strokes should include

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Uploaded: 19.01.2016
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69. What is the least number of strokes should include the grate to the spectrum of the first order can be seen separately two yellow sodium line with wavelengths λ1 = 589,0 nm and λ2 = 589,6 nm? What is the length l of such a lattice, if the distance between strokes b = 10 m?

Additional information

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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