Question

When sound travels from air to water, the quantity that remains unchanged is:

• A. speed
• B. wavelength
• C. intensity
• D. frequency

Answer 1

The correct option is D frequency

When sound travels from one medium to another the speed definitely changes because the speed of sound is different in different materials. When sound travels from air to water speed definitely changes, wavelength changes and intensity also changes because some part of sound is reflected and only some part is transmitted. The transmitted sound will have lesser intensity. Only frequency remains unchanged.