The relation between Frequency and Wavelength
V = f λ,
Where
V is the speed or velocity of Light, and = 2.998*108 m.sec-1
λ is the Wavelength of Light
f is the frequency of light, = 1.20*1013 sec-1
Putting in the equation
λ = V/f = 2.998*108 m.sec-1 / 1.20*1013 sec-1
λ = 2.499*10-5 m = 2.50*10-5 m
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