where '''f''' is the frequency of the electromagnetic wave and h is Plank's constant and has the numerical value of 6.626*10^-34 J*s or 4.135*10^-15 eV*s. | where '''f''' is the frequency of the electromagnetic wave and h is Plank's constant and has the numerical value of 6.626*10^-34 J*s or 4.135*10^-15 eV*s. |