Radio waves from a star, of wavelength 250 m, reach a radio telescope by two separate paths, as shown in Figure. 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 25.0? above the horizon. Find the height of the cliff. (Assume no phase change onreflection.)

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Direct path Reflected path