c = fd
where
c is the speed of light (3 x 108 ms-1)
f is the frequency
and d is the wavelength
Hence f = c/d
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Frequency = (speed) / (wavelength)
velocity = frequency multiply wavelength Rearrange the equation to find the frequency
you count the waves. so for example you '~' would be a wavelength of 1.
Wavelength times frequency equals 'the speed of light'. so wl = c/f
speed= frqquency*wavelength