You go to a dance club to forget how hard your astronomy midterm was. what is the frequency of a wave of ultraviolet light coming from a blacklight in the club, if its wavelength is 150 nm?

frequency of wave is defined as ratio of speed and wavelength

here we know that for ultraviolet light speed is given as

also the wavelength is given as

now we know that

[/tex] f = \frac{c}{\lambda}[\tex]

so here frequency of light is 2 * 10^15 Hz