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Consider two conducting plates of infinite extent, one plate at z = 0 and the other at z= L
, both parallel to the xy plane. The vector and the scalar potential in the region between the
plates is given by A(r.t)= A,cosot (kz + a)cos (ket) and ø(r,t)=0. Choose the
condition which represents a standing wave in the empty region between the plates.
(a) k= and a=0
L
27
(b) k =:
and a
L
(c) k =
and a
2L
(d) k = and a=0
2L
||

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