Question: 1 2 . 7 Plane Wave. A wave propagates in free space and its electric field intensity is E = hat ( x ) 1

12.7 Plane Wave. A wave propagates in free space and its electric field intensity is E=hat(x)100e-j220z+hat(x)100ej220z[Vm] :
(a) Show that E satisfies the source-free wave equation.
(b) What are the wave's phase velocity and frequency?
1 2 . 7 Plane Wave. A wave propagates in free

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