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(B) The standard equation for a progressive wave is given by $y = A \cos (\omega t - kx)$.Given equation: $y = 3 \cos (100 \pi t - \pi x)$.Comparing t

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$2$

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(B) The standard equation for a progressive wave is given by $y = A \cos (\omega t - kx)$.Given equation: $y = 3 \cos (100 \pi t - \pi x)$.Comparing the given equation with the standard form,we get the wave number $k = \pi 	ext{ rad/cm}$.The relationship between wavelength $\lambda$ and wave number $k$ is $\lambda = \frac{2\pi}{k}$.Substituting the value of $k$: $\lambda = \frac{2\pi}{\pi} = 2 	ext{ cm}$.Therefore,the wavelength of the wave is $2 	ext{ cm}$.

If the equation of a progressive wave is given by $y = 3 \cos \pi (100 t - x) \text{ cm}$,then what is the wavelength of the wave in $\text{cm}$?

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