The answer has a lot to do with why you call it "red paper". Could that be because
the paper absorbs light of any other color, and reflects the red light toward your eyes ?
If you shine red light on black paper, the black paper will absorb most of the red light and appear dark. The red light that is not absorbed may be reflected or scattered, but it will not significantly change the appearance of the black paper.
When a red light hits a white object, the object reflects most of the red light wavelengths while absorbing others. This selective reflection gives the object its white appearance, as white objects reflect most of the visible light spectrum, including red light.
The green paper will absorb most of the red light and reflect or transmit very little of it. This is because the green pigment in the paper absorbs red light and reflects green light. Therefore, the red light will not be well reflected from the green paper, making it appear dark or black.
The paper appears dark because red light is absorbed by the blue pigment, not reflected. The blue pigment absorbs red light and reflects blue light, which is why the paper appears blue under white light.
When white light hits a red apple, the apple absorbs all the colors in the white light except for red. The red color is reflected off the apple and that is what we see. The other colors are absorbed by the apple's pigments.
If you shine red light on black paper, the black paper will absorb most of the red light and appear dark. The red light that is not absorbed may be reflected or scattered, but it will not significantly change the appearance of the black paper.
When a red light hits a white object, the object reflects most of the red light wavelengths while absorbing others. This selective reflection gives the object its white appearance, as white objects reflect most of the visible light spectrum, including red light.
The green paper will absorb most of the red light and reflect or transmit very little of it. This is because the green pigment in the paper absorbs red light and reflects green light. Therefore, the red light will not be well reflected from the green paper, making it appear dark or black.
The paper appears dark because red light is absorbed by the blue pigment, not reflected. The blue pigment absorbs red light and reflects blue light, which is why the paper appears blue under white light.
When white light hits a red apple, the apple absorbs all the colors in the white light except for red. The red color is reflected off the apple and that is what we see. The other colors are absorbed by the apple's pigments.
The red light is reflected by the red apple because the apple absorbs all other colors except red, which it reflects back to our eyes. This is why we see the apple as red.
No, yellow paper does not absorb red light. Yellow paper absorbs blue light and reflects yellow light, giving it its yellow appearance. Red light is not absorbed by yellow paper, so it is reflected or transmitted through the paper.
The blue paper will absorb some of the red light and reflect the rest, appearing a shade of purple where the two colors overlap. Since red and blue are complementary colors, the paper may also appear to have a grayish tint where the colors mix.
The white paper appears red under a red light because the paper is reflecting and absorbing certain wavelengths of light. When red light shines on the paper, the paper reflects the red light and absorbs other colors, making it appear red.
The red paper absorbs all of the other colors in the spectrum and reflects red so that is the color it appears to be.
The red pigment in the paper will absorb all colors except red, which will be reflected. When yellow light shines on the paper, which contains red pigment, the red pigment will absorb the other colors in the yellow light spectrum but reflect the red light. So, the paper will appear red under yellow light.
Paper will appear to be black under a red light because red light has a long wavelength and is less likely to reflect off the white surface of paper.