The diagram above illustrates a mode of vibration of a wire of length 125 cm. The speed of the waves along the wire is 120 ms-1. Use the diagram to answer questions 2 and 3. Determine the wavelength of the waves.
Attached Figure / Diagram
A
1.00m
B
0.75m
C
0.25m
D
0.50m
Verified Correct Answer: D.
Physical Principles & Numerical Solution
Number of cycles, n = \(2\frac{1}{2} = \frac{5}{2}\)
Length = n\lambda
\lambda = \(\frac{Length}{n}\) = \(\frac{125}{\frac{5}{2}}\)
Therefore, \lambda = 50cm = 0.50m.
Source: Myschool Past Questions Archive (Record #69352)