Question: It is a common experience that on a calm, sunny day one can hear voices of persons in a boat over great distances. Explain this

It is a common experience that on a calm, sunny day one can hear voices of persons in a boat over great distances. Explain this phenomenon, keeping in mind that sound is reflected from the surface of the water and that the temperature of the air just above the water's surface is usually less than that at a height of 10 or 20 m above the water.

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