Explanation: The given function is: y = (3*10^8) / x where: y is the frequency x is the wavelength
We want to find the wavelength at frequency 3 * 10^9 Therefore, all what we will do is substitute y with the given frequency and solve for x as follows: y = (3*10^8) / x 3 * 10^9 = (3*10^8) / x x = (3*10^8) / (3*10^9) x = 0.1 which is equivalent to 1 * 10^-1 m
