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 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.
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.
A green object would appear dark or almost black under yellow light. This is because yellow light consists of wavelengths that are primarily in the yellow part of the spectrum, and it does not contain much green light. Therefore, the green object would not reflect much light back to our eyes, resulting in its dark appearance.
The object would be black, because red cannot reflect green light so no colour is reflected of the object.
blue
black
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.
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.
The red object would appear red under a red light because objects primarily reflect the color of light that is shining on them. Since red light contains mainly red wavelengths, the object would still reflect red light and appear red.