Electromagnetism exhibits the qualities of amplitude (brightness) and frequency (color).
Does gravity exhibit amplityde and frequency, and if so, how do we encounter them?
Electromagnetic waves exhibit qualities of amplitude and frequency. Gravitational waves exhibit the same qualities.
I think you can use E= h(NU) to calculate the frequency of the graviton and C= (NU) (Lambda) to calculate the wavelenght. But until they are able to measure the gravitons, you might have to wait.
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[Quote from American Scientist]
(http://americanscientist.org/articles/02articles/02-09hoganintro.html)
Also, I think brightness should be intensity of light (that is amplitude squared).