Why is the sofar layer efficient for sound travel?
a. Refraction causes the sound energy to remain within the layer.
b. The density of the sofar layer traps the sound energy.
c. Sound energy bends away from layers of lower sound velocity.
d. Temperatures and salinity conditions are homogeneous.
ANS: A
Upward traveling sound waves are generated in the sofar layer tend to bend back downward. The
reverse happens for downward travelling sound waves. The sound waves bend towards layers of lower
sound velocity which allows the sound waves to remain within the layer. Information can be found in
the section Sound Travels Much Farther Than Light through the Ocean.
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