Radio waves of wavelength 250 m from a star reach a radio, Physics

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Radio waves of wavelength 250 m from a star reach a radio

Radio waves of wavelength 250 m from a star reach a radio telescope by two separate paths. One is a direct path to the receiver which is situated on the edge of a cliff by the ocean. The second is by reflection off the water. The first minimum of destructive interference occurs when the star is 25 deg above the horizon. Find what is the height of the cliff.

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Physics: Radio waves of wavelength 250 m from a star reach a radio

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