How do you calculate the frequency of light that has a wavelength of 4.25 x 10 9m?; What is the frequency of an electromagnetic with a wavelength of 3.8 x 10 7 m?; What is the wave number of an EM wave having frequency 6 times 10 14 Hz?; What is the wavelength of light waves if their frequency is 5.0 x 10ยนโด Hz?