What is the frequency of a electromagnetic wave with a wavelength of 1.0 X #10^5# m?

1 Answer
Jul 1, 2014

The frequency , speed and wavelength of an electromagnetic wave are related by the formula

Speed = frequency x wavelength

frequency = speed / wavelength

substituting the values

frequency = 3 x #10 ^8# m /s / 1 x #10^15# m

               =  3 x #10^-7# /s