It makes sense that daylight has more blue tones, because of the sky? Is this the reason?
anikgupta2013
I believe so. Also, how do we define what the color of an object is since it seems to be heavily dependent on which wavelengths of energy hit it? For example, can't an object which reflects energy at 700 nm and 550 nm be visible as primarily red with some green under incandescent light, but only green under flourescent light?
xinwei-zhuang
a quick search on internet: Sunlight is scattered by the particles of the atmosphere, and what comes through down to earth is called diffuse sky radiation, and though only about 1/3rd of light is scattered, the smallest wavelengths of light tend to scatter easier. (and the blue light has the smallest wavelength!)
nobugnohair
@anikgupta2013 actually the color of an object is defined by the wavelengths of lights it reflects instead of how it looks like under any specific light. We intuitively think color is based on human perception, when in reality it is the other way around haha.
joshua16266261
Could we also define similar curves for a surface based on the intensity of light that it reflects by wavelength? So that a white surface like a piece of paper might be even across all wavelengths, whereas a leaf might be more concentrated around the green wavelengths. And then to figure out what color that surface will look like under different lighting, we could multiply the curve of the light hitting the surface with the curve of how that surface reflects light?
It makes sense that daylight has more blue tones, because of the sky? Is this the reason?
I believe so. Also, how do we define what the color of an object is since it seems to be heavily dependent on which wavelengths of energy hit it? For example, can't an object which reflects energy at 700 nm and 550 nm be visible as primarily red with some green under incandescent light, but only green under flourescent light?
a quick search on internet: Sunlight is scattered by the particles of the atmosphere, and what comes through down to earth is called diffuse sky radiation, and though only about 1/3rd of light is scattered, the smallest wavelengths of light tend to scatter easier. (and the blue light has the smallest wavelength!)
@anikgupta2013 actually the color of an object is defined by the wavelengths of lights it reflects instead of how it looks like under any specific light. We intuitively think color is based on human perception, when in reality it is the other way around haha.
Could we also define similar curves for a surface based on the intensity of light that it reflects by wavelength? So that a white surface like a piece of paper might be even across all wavelengths, whereas a leaf might be more concentrated around the green wavelengths. And then to figure out what color that surface will look like under different lighting, we could multiply the curve of the light hitting the surface with the curve of how that surface reflects light?