A tuning fork produces sound waves of wavelength in air

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

A tuning fork produces sound waves of wavelength 0.68 m0.68\,\text{m} in air, where the speed of sound is 340 m s−1340\,\text{m s}^{-1}. The same fork is then sounded in water, where sound travels at 1500 m s−11500\,\text{m s}^{-1}. Which statement is correct? (a) Both frequency and wavelength increase in water. (b) Frequency remains the same, but wavelength increases in water. (c) Frequency increases, but wavelength remains the same in water. (d) Frequency remains the same, but wavelength decreases in water.

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