A travelling wave of amplitude 0.80 m has a frequency of 16 Hz and a
PHYSICS
JAMB 2023
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
Correct Answer: C. 5
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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