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achieved by a trick with the dirac delta function. Typically we write the

orthogonality conditions for u1=c*exp(i*k1*x) and u2=c*exp(i*k2*x) as:

int(u1*u2)=delta(k1-k2)

and then out pops the nomalization constant c=1/sqrt(2*pi*hbar). This is

great and all, but what does it mean - we still violate the normalization

condition over all but one length! So what does it mean to 'delta function

normalize'? There are numerous other simialr situations which lead to the

same kind of issue.

Any thoughts?

Thanks