The frequency (f) and length (l) of a wave are related by the following formula: f x l = 3.0 x 1010. consider that the wavelength of x-rays is 1 x 10−11. what is the frequency of x-rays? a)1.1 x 1021b)1.1 x 1024c)3.0 x 1021d)3.0 x 1020