# When sound waves travel from air to water which of the following quantities remains unchanged? with Answer - Everyday Science Mcqs | TestPrep

> Solved MCQ: When sound waves travel from air to water which of the following quantities remains unchanged? Correct Answer: B. Frequency. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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# When sound waves travel from air to water which of the following quantities remains unchanged?

Direct Answer & Quick Reference

The correct option is **B. Frequency**.

Sound is propagated in the form of longitudinal waves. When sound travels from one medium to another medium the wavelength and velocity remains changed and the frequency remains un...

A. Speed

B. Frequency **(Correct Answer)**

C. Intensity

D. Wavelength

✨ Explain with AI

Verified Key: B. Frequency
Solved by 5,425+ students

**Detailed Explanation & Reference:**

Sound is propagated in the form of longitudinal waves. When sound travels from one medium to another medium the wavelength and velocity remains changed and the frequency remains unchanged.The velocity of sound in the given medium is obtained by v=nW, where “n” is the frequency of sound and “W” is its wavelength in that medium. Velocity of sound is directly proportional to the wavelength.Thus, if the velocity of sound wave doubles when travelled from one medium to another medium then its wavelength also doubles.The frequency of sound depends on the source of the sound, not the medium of propagation .Hence the frequency does not change when travelled from air to water.

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