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Wavelength

For the wave ...

Question

For the wave $y = 5 s i n 30 π [t - (x / 240)]$ is in seconds. Find the wavelength(in cm).

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Solution

For wave $y = A s i n [ω t - k x]$ ,

$k = \frac{2 π}{λ}$

Thus $\frac{2 π}{λ} = \frac{30 π}{240}$

$⟹ λ = 16 c m$

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