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Frequency and wavelength are related to speed of light (in vacuum) by the following relation:
`lambdanu = c`
i.e., the product of wavelength and frequency of a wave is equal to the speed of light in vacuum.
Using the given value of frequency (22 hz) and known value of speed of light in vacuum (3 x10^8 m/s), we can calculate the wavelength as:
`lambda = c/nu = (3xx10^8)/22 = 1.4 xx 10^7 m`
hope this helps.
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