* The speed of light is constant: In a vacuum, the speed of light (c) is approximately 299,792,458 meters per second. This value is independent of the wavelength of light.
* Wavelength and frequency are related: While different wavelengths of light have different frequencies, the product of wavelength (λ) and frequency (ν) always equals the speed of light:
c = λν
Therefore, even though light rays with different wavelengths have different frequencies, they all travel at the same speed in a vacuum.
In essence, the ratio of velocities of light rays with wavelengths 4000 Å and 8000 Å is 1:1.
