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:
Spreading of a pulse as it propagates in a dispersive medium
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andrien
#
2
Feb14-13, 01:35 AM
P: 976
that is a trick.you have to write cos(k
_{0}
x) as Re(e
^{ik0x}
),you will get only exponentials then you will have to complete the square in powers of exponentials and use of a simple gaussian integral.
∫
_{0}
^{∞}
e(-x
^{2}
)dx=√∏/2