A wavelength is the distance from a point on one wavelength to the same point on the next one. We often measure from the crest of one (the top) to the crest of the next. Since all light travels at the speed of light, the number of waves that would pass a given point in a second is known as the frequency. Low frequency waves have a longer wavelength, high frequency waves have a shorter wavelength. Wavelength and frequency are related by the equation = c / where = the frequency, c = the speed of light 3.00x108 m/sec (or meters per second), and = wavelength. While the label on a wavelength is a metric distance such as nm, cm, or meters, the label on a frequency calculates to "per second" (1/sec) when using dimensional analysis. Because we find this to be a little strange, it is often interpreted as "waves per second" (waves/sec) or a label of Hertz (Hz). They all mean the same thing. Because of this relationship, it is possible to convert wavelength into frequency or frequency into wavelength: What frequency corresponds to a wavelength of 500 nm? v= c/= ((3.00x10^8 m/sec)/(500 nm))((10^9