What is the wavelength if the time period of a wave is 1 millisecond and the velocity of the wave is 330 ms $^{- 1}$ ?

33 cm

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55 cm

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44 cm

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99 cm

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Solution

The correct option is A 33 cm
We know that, $v = f λ$
Given, velocity, $v = 330 m / s,$ frequency, $f = 1 / T = 1 / 10^{- 3} = 10^{3}$ Hz
Thus, wavelength, $λ = v / f = 330 / 10^{3} = 0.33 m = 33 c m$

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