Usually when we think of frequency we think of it as events per second (Hz) and we think of wavelength as a physical length (ex. nm). So we cannot directly relate them without another constant.

For light in a vacuum we can use equation lambda = c / f, where lambda is wavelength in meters, c is speed of light in m/s, and f is frequency in Hz (1/s).

Usually when we think of frequency we think of it as events per second (Hz) and we think of wavelength as a physical length (ex. nm). So we cannot directly relate them without another constant.

For light in a vacuum we can use equation lambda = c / f, where lambda is wavelength in meters, c is speed of light in m/s, and f is frequency in Hz (1/s).