5.09 x 1014 s-1-the speed of light is a constant, 3.00 x 108 m/s. the product of the frequency (n) and the wavelength (l) is equal to the speed of light (c). therefore, the frequency is equal to the speed of light (c) / wavelength (l) or, [ 3.00 x 108m/s / 589 nm ] [ 1 nm / 10-9 m ] = 5.09 x 1014 s-1.because the wavelength is given in nanometers, you must convert it to meters. ( s-1 is an abbreviation for 1/sec.) (round off the 589 to 600 to make the division easier.) 6.626 x 10-34 j-s is known as plancks constant measured in joule-seconds.
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