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.
- 3
- 4
-
5
- 2
The correct answer is: C
Explanation
A=0.8m; f=16Hz; v=20 \(ms^-1\); k=?
v = fλ
λ =1.25m
= k= \(\frac{2π}{λ}\) =\(\frac{2 × 3.142}{1.25}\)
k= 5m ( to 1 s.f)
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