A. when sound travels from air to a denser medium, it is refracted away from the normal at the point of incidence
B. sound travels faster in air than in water
C. the wavelength of sound changes when it travels from to water
D. the frequency of it travels from air to water
Correct Answer: Option C
C. the wavelength of sound changes when it travels from to water
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![A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560m/s]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560m/s]")