Humans evolved in the solar system. According to the Wi […]
Humans evolved in the solar system. According to the Wien displacement law of blackbody radiation, we can calculate that the center wavelength of sunlight is around 550 nm, while the center wavelength of blue LED is 465 nm, which deviates from the center wavelength of sunlight, so from the perspective of evolution In other words, our human eyes cannot accept "excessive" blue light.