Derive expression for group velocity of extraordinary wave

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Reference no: EM13286671

Group and phase velocity in uniaxial crystals:
a. Derive an expression for the group velocity of the extraordinary wave in a uniaxial crystal as a function of the polar angle ? of the propagation vector.
b. Derive an expression for the angle a between the phase velocity and the group velocity. What is the angle between the field vectors E and D?

Reference no: EM13286671

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