What is the frequency of an ultraviolet photon with wavelength 100?

The frequency of an ultraviolet photon with a wavelength of 100 nm can be calculated using the equation: frequency = speed of light / wavelength. Plugging in the values (speed of light = 3 x 10^8 m/s, wavelength = 100 nm = 100 x 10^-9 m) gives a frequency of approximately 3 x 10^15 Hz.