To determine the wavelength from a given frequency, you can use the formula wavelength = speed of light / frequency. The speed of light is a constant value of approximately 3 x 10 8 meters per second. To calculate the wavelength, divide this value by the frequency in hertz. For example, if the frequency is 5 x 10 14 Hz, the wavelength would be 3 x 10 8 meters per second / 5 x 10 14 Hz = 0.006 meters or 6 x 10 -3 meters.