A travelling wave of amplitude 0.80 m has a frequency of 16 Hz and a wave speed of 20 ms-1
Source: 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 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.
Explanation
Wavelength λ = v ÷ f = 20 ÷ 16 = 1.25 m.
Wave number k = 2π/λ = 2π ÷ 1.25 ≈ 5.03, which is about 5 (in rad/m). The amplitude is not needed here.
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