In summary: color preception is dependant on the wave length of light radiation impenging on certain sensitive receptor cells in the retina, which is an extention of the organic brain.
The basics of how color is seen deals with the objects ability to reflect and absorb light. An object that appears green is absorbing every color of the visible spectrum except for that specific wavelength of green.
For example an apple. Apples are red by the way!
The light from the sun or from anywhere where light comes from, the light hits the apple! Since apples are red, all of the other color EXCEPT for red get absorbed and the color red bounces off (reflects off).
cranberryhead
The object will appear white. When an object reflects all colors of light equally, it will appear white because white light is a combination of all colors in the visible spectrum.
The object will appear white under white light if it reflects all the colors of light. This is because white light is a combination of all visible colors in the spectrum.
If an object absorbs all colors of light and reflects none, it will appear black under white light. This is because black is the absence of any reflected light.
A white object under red light will appear red. This is because white objects reflect all wavelengths of visible light, including red light, while absorbing little to no light. The white object will reflect the red light, giving it a red appearance.
A red object reflects red light and absorbs other colors of light. When white light shines on a red object, all the colors of the spectrum are absorbed by the object except for red, which is reflected back to our eyes.
blue
blue
The object will appear white. When an object reflects all colors of light equally, it will appear white because white light is a combination of all colors in the visible spectrum.
Blue what ? ! ? Do you mean an object that appears blue in white light ? Such an object appears black in green light.
Black will be the color of a yellow object in a dark room while white light falls on it.
The object will appear white under white light if it reflects all the colors of light. This is because white light is a combination of all visible colors in the spectrum.
When the light reflects on an object into your eye you see the objects colour. When all of the light reflects into your eye you see the colour as white. So if some of the light is absorbed into the object you see it as it being a certain colour. There are cone cells in the eye that detect color (the other type of cells is rod cells, which are better at distinguishing light/darkness and patterns). Different colors of light excite different cone cells and cone cell clusters and these cells transmit signals to your brain, which interprets these signals as color vision.
If an object absorbs all colors of light and reflects none, it will appear black under white light. This is because black is the absence of any reflected light.
A white object under red light will appear red. This is because white objects reflect all wavelengths of visible light, including red light, while absorbing little to no light. The white object will reflect the red light, giving it a red appearance.
If the light source is truly cyan, the red object should appear black. The object is red because it reflects the red portion of the white light spectrum. With no red wavelengths available to be reflected, the object will have a lack of color (i.e., black).
A red object reflects red light and absorbs other colors of light. When white light shines on a red object, all the colors of the spectrum are absorbed by the object except for red, which is reflected back to our eyes.
Why do you call it a "white object" ? Could it be because it looks white under white light ... light composed of every color ? Well then, the object must reflect every color. So it appears to be the color of whatever light you illuminate it with. Yellow under yellow light, etc.