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The battleship now wants to send the signal to the Navy base on the land. Therefore the battleship acts as a source and the Navy base acts as a detector in the diagram. The shortest path these waves travel is r which is the distance D straight along the ocean. The longest path these waves travel is 2. This path consists of traveling up to the upper atmosphere a height H above the ground and then being reflected back down to the detector in the lower atmosphere. Consider if a heavy storm is forming in the upper atmosphere so that the index of refraction of the upper atmosphere is greater than the index of refraction of the lower atmosphere where the battleship and Navy base are.) source atmosphere D detector Find the lowest frequency (in kHz) that the detector at the Navy base must be tuned to in order to receive the signal from the battleship. Let D = 100 km and H= 70 km. (B) 2.1 (D) 5.4 (A) 6.9 (C) 4.9 (E) 7.6

The battleship now wants to send the signal to the Navy base on the land. Therefore the battleship acts as a source and the Navy base acts as a detector in the diagram. The shortest path these waves travel is r which is the distance D straight along the ocean. The longest path these waves travel is 2. This path consists of traveling up to the upper atmosphere a height H above the ground and then being reflected back down to the detector in the lower atmosphere. Consider if a heavy storm is forming in the upper atmosphere so that the index of refraction of the upper atmosphere is greater than the index of refraction of the lower atmosphere where the battleship and Navy base are.) source atmosphere D detector Find the lowest frequency (in kHz) that the detector at the Navy base must be tuned to in order to receive the signal from the battleship. Let D = 100 km and H= 70 km. (B) 2.1 (D) 5.4 (A) 6.9 (C) 4.9 (E) 7.6

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The battleship now wants to send the signal to the Navy base on the land. Therefore the battleship acts as a source and the Navy base acts as a detector in the diagram. The shortest path these waves travel is r₁ which is the distance D straight along the ocean. The longest path these waves travel is 2. This path consists of traveling up to the upper atmosphere a height H above the ground and then being reflected back down to the detector in the lower atmosphere. Consider if a heavy storm is forming in the upper atmosphere so that the index of refraction of the upper atmosphere is greater than the index of refraction of the lower atmosphere where the battleship and Navy base are.) source atmosphere D detector Find the lowest frequency (in kHz) that the detector at the Navy base must be tuned to in order to receive the signal from the battleship. Let D = 100 km and H= 70 km. (B) 2.1 (D) 5.4 (A) 6.9 (C) 4.9 (E) 7.6
Transcribed Image Text:The battleship now wants to send the signal to the Navy base on the land. Therefore the battleship acts as a source and the Navy base acts as a detector in the diagram. The shortest path these waves travel is r₁ which is the distance D straight along the ocean. The longest path these waves travel is 2. This path consists of traveling up to the upper atmosphere a height H above the ground and then being reflected back down to the detector in the lower atmosphere. Consider if a heavy storm is forming in the upper atmosphere so that the index of refraction of the upper atmosphere is greater than the index of refraction of the lower atmosphere where the battleship and Navy base are.) source atmosphere D detector Find the lowest frequency (in kHz) that the detector at the Navy base must be tuned to in order to receive the signal from the battleship. Let D = 100 km and H= 70 km. (B) 2.1 (D) 5.4 (A) 6.9 (C) 4.9 (E) 7.6
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