All frequencies of light in hertz are in between
[tex]Red = 4 * 10 ^{14} Hz [/tex] and
[tex]Violet = 8 * 10 ^{14} Hz [/tex]
Light with a lower frequency than 4 * 10^14 Hz, are called infrared and can't be seen by human eye. Light with a higher frequency than 8 * 10^14 Hz, are called ultraviolet and can't bee seen by human eye.
Therefore, the maximum frequency of visible light in Hz, is 8 * 10^14 Hz
