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In the given equation, corrugation period is given by lλb/2Ne. If λb is the Bragg wavelength, then what does ‘l’ stand for?

In the given equation, corrugation period is given by lλb/2Ne. If λb is the Bragg wavelength, then what does ‘l’ stand for? Correct Answer Integer order of grating

The period of corrugation is given by Period of corrugation = lλb/2Ne Where, λb = Bragg wavelength L = integer order of grating.

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