White.
==================
2nd opinion:
An object that reflects all colors appears to be the same color
as the light with which it's being illuminated, whatever that is.
3rd answer.
The second opinion shows a misunderstanding of light. some wavelengths are absorbed more than others, which leaves the reflected wavelengths we see.
As the question specified 'all colours' then the correct answer is white.
Black
Since an object is observed as the color(s) it reflects, a green object absorbs all colors and reflects green.
Black
White. Black absorbs all colors of the light spectrum and thats why it feels hot and looks black. White objects reflect all forms of light, therefore they are cooler in sunlight. An objects color is determined by what color of light it reflects. Since white is all the colors combined, if a substance reflects all the colors then it appears white. If another substance absorbs every color except for 1 shade of red, then the substance will appear that exact shade of red that it reflects.
It will be white, because really, objects both reflect and absorb colors. For example, a red object absorbs every color aside from red, which reflects back. White absorbs no color and reflects all colors, while black absorbs them all and reflects none. the rainbow will be reflected back
When light of all colors (wavelengths) is absorbed by an object, the object appears black.
Since an object is observed as the color(s) it reflects, a green object absorbs all colors and reflects green.
If it reflects that color of light, you're eyes will see that color being reflected by the object (when the color is being shown on the object, white light contains 'all' colors of visible light). If an object absorbs a color of light you will tend not to see it coming off of the object. Translation: objects will appear the color(s) of light that it reflects. If an object appears red, it reflects red light.
Since an object is observed as the color(s) it reflects, a green object absorbs all colors and reflects green.
Black
Since an object is observed as the color(s) it reflects, a green object absorbs all colors and reflects green.
White. Black absorbs all colors of the light spectrum and thats why it feels hot and looks black. White objects reflect all forms of light, therefore they are cooler in sunlight. An objects color is determined by what color of light it reflects. Since white is all the colors combined, if a substance reflects all the colors then it appears white. If another substance absorbs every color except for 1 shade of red, then the substance will appear that exact shade of red that it reflects.
The color that we see is not the color of the object in question, but the color of the light it reflects. This means that a "green object" absorbs all colors of the visible spectrum except for green light, which it reflects back to our eyes. White light is the combination of the entire visible spectrum combined. Thus a "white object" reflects all colors of light. On the opposite side of this question, a "black object" absorbs all colors of light, because "black" is the absence of color.
It will be white, because really, objects both reflect and absorb colors. For example, a red object absorbs every color aside from red, which reflects back. White absorbs no color and reflects all colors, while black absorbs them all and reflects none. the rainbow will be reflected back
Color is produced by the reflection of lights. If you have a blue object, it is reflecting blue light and is absorbing all other colors. A white object absorbs all colors and a black object reflects all.
If an object absorbs all the colors in white light, it reflects black.
When light of all colors (wavelengths) is absorbed by an object, the object appears black.
White light is made up of all the colors. If a paper is white, it is reflecting all the colors of light. We know that the color of an object is determined by the color(s) of light it reflects. If an object is green, for example, it reflects green light and absorbs all other colors.