refraction
When light passes through a red filter, the color that comes through is red, as the filter absorbs other colors of light and only allows red wavelengths to pass through.
When light passes through a concave lens, it diverges or spreads out. This causes the light rays to bend away from each other. In contrast, when light goes through a convex lens, it converges or comes together at a focal point. This causes the light rays to bend towards each other.
Nothing comes through. A red light emits no blue light, and a blue filter allows only blue light to pass ... that's why when you look at it, you say to yourself "Hey! That filter looks blue. I'll call it a 'blue filter'."
The reason that particular device is called a "redfilter" is that only red light cansurvive the trip through it and come out the other side, so that it appears red.Any other color of light is absorbed in the material that the filter is made of, andnever comes out.
The light ray will refract twice as it enters and exits the water.
When light passes through a concave lens, it diverges or spreads out. This results in the formation of a virtual and upright image. On the other hand, when light passes through a convex lens, it converges or comes together. This leads to the formation of a real and inverted image.
When white light passes through a red filter, only the red wavelengths are transmitted while all other colors are absorbed or blocked. This leaves the light appearing to be red in color.
If red light passed through the filter, then it would not be a blue filter. When a broad range of colors encounters the blue filter, by far the greatest share of the light that comes out of the other side is blue light, with very small amounts of other colors.
The light comes out the other side. At the same time people all around the object are staring at it in amazement, nudging each other in the ribs, and exclaiming "Wow! Look at that! That object is transparent!"
A translucent material transmits light, so that you could, for example, use it as a cover for a light fixture, or for a window, and light would get through, but it is not transparent; you cannot see through it. The light that comes through is not a visible image, it is illumination only.
A blue filter works by selectively absorbing other colors present in the white light and transmitting the blue light. The filter contains molecules that can absorb certain wavelengths of light, allowing only blue light to pass through.
No light will emerge from the different color paper, since all other colors except yellow have already been removed by the first one. The second one appears black.