The frequency is 666 MHz.
Light at 489 nanometers is in the blue area of the spectrum. Use the link below for more information.
X rays have a wavelength of 4.2 nm.
89
n
The frequency ranges between 450 THz and 950 THz.
416 nm
Apex - 467 nm
671 nm
Frequency is equal to constant divided by wavelength. 3.00x108 / 780nm equals approximately 4397435897.4359 hertz.
The frequency of blue light is approx. 450 nm
416 nm