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OpenStudy (anonymous):
a red light has a wavelength of 684nm. what is the frequency
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OpenStudy (frostbite):
Use the relationship between wavelength, velocity and frequency: \[\Large f=\frac{ c }{ \lambda }\] \(f\) is the frequency, \(c\) the speed of light and \(\lambda\) the wavelength. Ensure you get the units correct.
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