A radio station that uses a vertical dipole antenna broadcasts at a frequency of 1.20 MHz with

Question:

A radio station that uses a vertical dipole antenna broadcasts at a frequency of 1.20 MHz with total power output of 500 kW. The radiation pattern is as shown in Figure, i.e., the intensity of the signal varies as sin² θ, where θ is the angle between the direction of propagation and the vertical, and is independent of azimuthal angle. Calculate the intensity of the signal at a horizontal distance of 120 km from the station. What is the intensity at that point as measured in photons per square centimeter per second?

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