"Our definition of "white" is derived from emission from the 5800 K temperature near the surface of the sun. Its peak at near 550 nm (2.25 eV) is paralleled in the maximum sensitivity of our eyes in the same region. This is usually attributed to our evolution in the vicinity of our sun. No matter how high a temperature rises, blue-white is the hottest color we are able to perceive." off a site for color causes
@Neueregel: It's an order of magnitude estimate and an error of a factor 6/5 is totally acceptable for what I am concerned. It's not meant to be accurate. The wavelength of yellow light is also not actually 500 nm.
@peppermint78 True, the yellow light is ~570-580nm. Wien's gives exactly T=4997 K for λ=580nm. However, the Sun doesn't peak in yellow light, it peaks around lower wavelengths ~480nm-500nm which is yellow-green actually. Not to mention that it's true color is white-yellow, predicted for G-sequence stars. :) Sun is the master of disguise, or maybe we the deluded ones, with our totally deceptive senses (e.g. human sensitivity of 10-million colour only)
Nice presentation, the constants have usually so many units to consider. By transforming them into 1 it helps understanding them a lot !!! Also, @3:22 I think the Sun's surface temperature is ~6000 K actually, or ~5730 C (Wien's Law for λ=500 nm. I don't know how you got this huge error of 5000K, maybe from the approximation and rough rounding of electroniovolt's 'eV' value.
"Our definition of "white" is derived from emission from the 5800 K temperature near the surface of the sun. Its peak at near 550 nm (2.25 eV) is paralleled in the maximum sensitivity of our eyes in the same region. This is usually attributed to our evolution in the vicinity of our sun. No matter how high a temperature rises, blue-white is the hottest color we are able to perceive." off a site for color causes
Neueregel 3 months ago
@Neueregel Thanks :o)
peppermint78 3 months ago
@Neueregel: It's an order of magnitude estimate and an error of a factor 6/5 is totally acceptable for what I am concerned. It's not meant to be accurate. The wavelength of yellow light is also not actually 500 nm.
peppermint78 3 months ago
@peppermint78 True, the yellow light is ~570-580nm. Wien's gives exactly T=4997 K for λ=580nm. However, the Sun doesn't peak in yellow light, it peaks around lower wavelengths ~480nm-500nm which is yellow-green actually. Not to mention that it's true color is white-yellow, predicted for G-sequence stars. :) Sun is the master of disguise, or maybe we the deluded ones, with our totally deceptive senses (e.g. human sensitivity of 10-million colour only)
Neueregel 3 months ago
Nice presentation, the constants have usually so many units to consider. By transforming them into 1 it helps understanding them a lot !!! Also, @3:22 I think the Sun's surface temperature is ~6000 K actually, or ~5730 C (Wien's Law for λ=500 nm. I don't know how you got this huge error of 5000K, maybe from the approximation and rough rounding of electroniovolt's 'eV' value.
Neueregel 3 months ago