150 ms is speed. When we look at a light source the colours we see are dictated by the frequency of the light. Wavelength of light velocity of light frequency of light.
How are frequency and wavelength related.
For example red light has a wavelength of around 620 740 nm and blue light has a wavelength of around 445 500 nm. Wavelength of light velocity of light frequency of light. In the electromagnetic spectrum there are many different types of waves with varying frequencies and wavelengths. The wavelengths of visible light are measured in nanometres nm billionths of a metre but the equation works just the same.