yellow
yellow
When you mix red and blue, you get magenta. When you shine a green light on magenta, the green light will be absorbed by the magenta, resulting in a dark color or black, depending on the intensity of the green light.
Purple, as red light and blue light combine to create purple light.
To make green appear black, shine red light on it. Green absorbs red light, so when red light is shone on green, the green will appear black.
When you shine a green light on a green object, the object will reflect the green light and appear brighter or more vivid in color. Green objects absorb most of the other colors of light and reflect green light, so they will be most visibly affected by green light.
When you shine yellow light onto a green surface, the surface will absorb the yellow light and reflect green light. This is because the surface appears green due to its ability to reflect green light while absorbing other colors.
When green and red light shine on a green leaf, the green light is mostly absorbed by chlorophyll for photosynthesis. The red light is less efficiently absorbed, so some is reflected back, leading to the leaf appearing green to our eyes.
If the screen is actually white, it will absorb all light and appear black to your eye. If the screen appears white in normal light, all light will be reflected resulting in the combination of green and red (brown/yellow).
If you shine a green light on a red cap, the cap will likely appear dark or black because red objects absorb green light and do not reflect it back to our eyes. This is due to the color mixing phenomenon where red and green cancel each other out.
Things appear red because they absorb all wavelengths of visible light apart from red this will be reflected. If you only shine green light on the object it will all be absorbed and no light will be reflected so it will appear black.
blue
When green light shines on a green leaf, the leaf absorbs most of the green light and reflects some of it, giving the leaf its green color. Red light is not absorbed as efficiently by the leaf, so it gets reflected, making the leaf appear green under white light.