A travelling wave of amplitude 0.80 m has a frequency of 16 Hz and a wave speed of 20 \(ms-1\)
Calculate the wave number of the wave.
A
3
B
4
C
5
D
2
Verified Correct Answer: C.
Physical Principles & Numerical Solution
A=0.8m; f=16Hz; v=20 \(ms^-1\); k=?
v = f\lambda
\lambda =1.25m
= k= \(\frac{2\pi}{\lambda}\) =\(\frac{2 \times 3.142}{1.25}\)
k= 5m ( to 1 s.f)
Source: WAEC / JAMB / NECO Classroom Archive (Record #67940)