We are given this additional information:
Let antenna 1 be at x = 0. The wave that travels to the right is asin[2pi(x/lambda - t/T)]. The wave that travels to the left is asin[2pi(-x/lambda - t/T)]. Antenna 2 is at x = L. It broadcasts waves asin[2pi((x-L)/Lambda - t/T) + phi_20] to the right and asin[2pi(-(x-L)/lambda - t/T) + phi_20] to the left.
a) What is the smallest value of L for which you can create perfect constructive interference on the town side and perfect destructive interference on the fountry side? Your answer will be a multiple or fraction of the wavelength lambda.
b) What phase constant phi_20 of antenna 2 is needed?
c) What fraction of the oscillation period T must delta t be to produce the proper value of phi_20?
d) Evaluate both L and delta t for the realistic AM radio frequency of 1000 KHz.
I have the correct answers, I just don't know how to get to them.
b) 1/2 pi rad
3) 1/4 T
4) 75 m, 250 ns
Note: In the attached picture file, the blurred words on the right are supposed to say D_1right and D_2right.
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