Using the periodic boundary condition kxl kx and noting
Using the periodic boundary condition, ?k(x+L) = ?k(x) and noting that e(i2pn)=1, determine the allowed values of k in terms of L and an integer n. Are negative values of n allowed?
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using the periodic boundary condition kxl kx and noting that ei2pn1 determine the allowed values of k in terms of l
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