the colors are mixing, and it should actually look purple, but appears to be black. (its like mixing paint in a way...)
Since the filter allows only blue light to pass through, anything you see through the filter appears either blue or black. Blue if there's any blue light coming from it, or black if there isn't any.
green
A filter removes certain colors of light which pass through it. The primary colors of light are green red blue. Since the shirt absorbs all but blue light and the filter removes all but green it will appear black.
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'."
A red filter will absorb all but the red wavelength of light. A blue filter absorbs all but blue light. So the blue filter will absorb the red wavelength and no light will shine through.
grey
red filter
green
Since the filter allows only blue light to pass through, anything you see through the filter appears either blue or black. Blue if there's any blue light coming from it, or black if there isn't any.
Purple will the object be
green
The reason we call a blue filter a "blue filter" is that it looks blue. The reason it looks blue is that blue light is the only kind of light that can go all the way through it. Any other color of light gets absorbed in the dyes between the layers of the filter, and never comes out the other side. If you shine red light at one side of a blue filter, the other side of the filter looks dark, as if nothing is shining through it. And if you look at a 'red' sweater through a blue filter, the sweater looks black.
black because blue light cannot pass through a yellow filter
A filter removes certain colors of light which pass through it. The primary colors of light are green red blue. Since the shirt absorbs all but blue light and the filter removes all but green it will appear black.
Black because if a red light reflects off the blue surface there is no reflection, so the surface looks black.
Black because if a red light reflects off the blue surface there is no reflection, so the surface looks black.
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'."