When light is shined on a cyan object, it will appear cyan as long as the light source contains both blue and green wavelengths, which are the colors that make up cyan. If the light is white, the cyan object will reflect the blue and green light and thus still appear cyan. However, if the light is only red, the cyan object will appear black because it cannot reflect that color.
A green object under green light would appear green, as the light matches the object's color. The green light illuminates the object, causing it to reflect the same wavelength of light that it absorbs, resulting in no change in its perceived color. If the light were a different color, the object's appearance would change based on the light's wavelength and the object's ability to reflect or absorb that light.
A green object would look blaack in a red light because coloured objects absorb all colours except the colour they are, so a green object absorbs 6 colours (red, orange, yellow, blue, indigo, violet) and reflects 1 (green). In this situation, there is no green light to reflect and it can't reflect other colours, so it looks black. :)
A yellow filter would absorb blue light, making a blue object appear black in a black-and-white photograph.
You could use a yellow filter to absorb blue light, making the blue object appear black since no blue light would reflect off of it.
Under cyan light, a red object would appear black or very dark. This is because cyan light contains blue and green wavelengths, but lacks red wavelengths. Since the red object reflects red light and absorbs other colors, it cannot reflect any light under cyan illumination, resulting in a dark appearance.
The object would be black, because red cannot reflect green light so no colour is reflected of the object.
black
blue
The red light would be absorbed by the green object and the object would appear dark. The green object reflects green light and absorbs other colors.
A "green" object is called "green" because that's the only color of light it reflects, and it absorbs any other color. If orange light is shining on it, then there's no light for it to reflect, and it looks black to you.
Black light
That would be called a spotlight.
An object appears a certain color to you because it reflects that color of light and absorbs other colors of light. For example, a white object appears white because it reflects all colors of visible light (red, orange, yellow, green, blue, indigo, violet). A black object appears black because it absorbs all of these colors--and as a result, none of those colors are reflected back to your eyes. Under white light, the object appears yellow-green because it reflects both yellow and green light and absorbs all other colors. (Remember, white light has all colors of visible light in it). If only green light is present, there's only green light for it to reflect--so it will appear green. If you shined yellow light on it only, it would be yellow. If you shined yellow and green light, it would appear yellow-green again. It you shined red and blue light on it, it would appear black, because it absorbs both of those colors.
A green object under green light would appear green, as the light matches the object's color. The green light illuminates the object, causing it to reflect the same wavelength of light that it absorbs, resulting in no change in its perceived color. If the light were a different color, the object's appearance would change based on the light's wavelength and the object's ability to reflect or absorb that light.
Black, because the blue light would be absorbed into the object's pigment and as there is no green light to reflect, the object would appear black.
A blue object appears blue because it absorbs most colors and reflects blue light. However, when a red light shines on a blue object, the blue object would absorb the red light and reflect blue, so it would still appear blue.
shine - shone - shone. (shone is pronounced shon)."Shone" can be regarded as all-purpose.However "shined" is transitive - it needs an object - so shoes or a table can be shined, but it would not be appropriate to use "shined" as a description of someone's ability.