Compute what is the wavelength of the light

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Solve the following question:

Question: A multi-slit diffraction contains 4000 lines/cm or a slit separation of 2.5um. If the third bright fringe occurs at an angle of 30 degrees from the principles maximum what is the wavelength of the light?

Please show the work for the calculation so I can understand what I'm doing. Thanks!

Reference no: EM13690742

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