A. Lambda = y
B. Lambda = 2x
C. Lambda = y − x
D. Lambda = 2(y − x)
A tube is filled with water and a vibrating tuning fork is held above its open end.
The tap at the base of the tube is opened. As the water runs out, the sound is loudest when the water level is a distance x below the top of the tube. A second loud sound is heard when the water level is a distance y below the top. Which of the following is a correct expression for the wavelength l of the sound produced by the tuning fork?
this question is about waves and harmonics/overtones
Lambda means the distance of similar consecutive points or the distance which the wave form repeats.
Here we can first loud sound at distance x and second loud sound at distance y.
So lambda = distance between two loud sounds
So the answer is C