2006-10-30 16:03:17 · 3 answers · asked by wildbutterflychick 2 in Science & Mathematics ➔ Physics
Photons don't have colours they have wavelengths. Colour is a matter of human perception. For lighting applications, illumination is given in candelas, which normalize the radiometric intensity to the response of the human eye. Light that is perceived to be red has photons with wavelengths above 600 nm. Light that is perceived to be green has wavelengths between approximately 500 and 550 nm. White light is the perceptual response of the eye to illumination by photons of several different wavelengths at the same time. Note that the relative intensities at different wavelengths vary in "white" light sources, so there are actually many types of "white" light.
2006-10-30 16:55:19 · answer #1 · answered by d/dx+d/dy+d/dz 6 · 1⤊ 0⤋
No. White light is what we see when there is a combination of all types of photons. White light is not a particular wavelength of light, unlike red or green.
Think about rainbows...
2006-10-31 00:14:29 · answer #2 · answered by snoomoo 3 · 1⤊ 0⤋
White is not strictly a colour; it is the effect of combining the visible colours of light in equal proportions. A single photon can only have a "pure" colour from the visible spectrum (its colour corresponds to its wavelength).
2006-10-31 00:14:04 · answer #3 · answered by Anonymous · 1⤊ 0⤋