For this problem, consider the sum of two slightly different waves with similar electric fields:
v1(z,t) = sin(wt - kz)
v2(z,t) = sin([w + Dw]t - [k + Dk]z)
Derive analytically an expression for the group and phase velocity for the sum of the two fields.
HINT: sin(a) + sin(b) = 2 sin[(a+b)/2]cos[(a-b)/2]
For this problem, consider the sum of two slightly different waves with similar electric fields: v1(z,t)...
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