Question

when sound waves travels from air to water, what happens to its frequency ?​

Answer 1

Answer:

The result of frequency being constant results in an increase in wavelength and speed. Hence in "sound waves travel from air to water", the "frequency remains constant".

Answer 2

Answer:

Velocity of sound is directly proportional to the wavelength. Thus, if the velocity of sound doubles when it travels from one medium to another, its wavelength also doubles. The frequency of sound depends upon the source of sound, not the medium of propagation. Hence, it does not change.