cyan
green
It will look black, or green, depending on the hue of the red. A green filter blocks the red light but no red object is reflecting solely in the red wavelengths, and any non-red light will appear green through the filter.
A green object appears black when viewed through a red filter (here a red filter means red light) because green object can only reflect green color and absorb all the other colors so in the red light it will definitely appear black.
They prevent certain wavelengths (i.e. colours) from passing through. This means that you only see the colours that do pass through. If the object itself is coloured this may result in it becoming invisible if the filter is one that stops the object's colour from passing through it.
What is true is that the light has a green component. That's why it appears green. The green light can get through. There may have been another or other colors of light present when the light entered the filter, but because the filter is green, the other colors were absorbed. Remember, if an object is a given color, it is that color because it reflects that color and absorbs all others.
Purple will the object be
green
green
You will see the orange object in red-orange.
It will look black, or green, depending on the hue of the red. A green filter blocks the red light but no red object is reflecting solely in the red wavelengths, and any non-red light will appear green through the filter.
A green object appears black when viewed through a red filter (here a red filter means red light) because green object can only reflect green color and absorb all the other colors so in the red light it will definitely appear black.
They prevent certain wavelengths (i.e. colours) from passing through. This means that you only see the colours that do pass through. If the object itself is coloured this may result in it becoming invisible if the filter is one that stops the object's colour from passing through it.
What is true is that the light has a green component. That's why it appears green. The green light can get through. There may have been another or other colors of light present when the light entered the filter, but because the filter is green, the other colors were absorbed. Remember, if an object is a given color, it is that color because it reflects that color and absorbs all others.
The wavelengths are corresponded to the color of the light. A blue object will reflect any light radiation expect the color blue. It will absorb the blue light.
You really can't do exactly what you want. The closest you can get is to view an ENTIRE SCENE including this red object using a red filter, with the scene brightly illuminated (with either red or white light). Then your visual system will have no basis to assign the color red to this red object and it will appear as a shade of gray (to black or white, depending on how much light is absorbed by this object).
Red. A primary filter allows only one colour through.
You're probably thinking of a filter, lens or gel. All of these can be used to unify the color of light which passes through them, allowing certain frequencies (or colors) through while blocking others as they are emitted from the source (ie a bulb) or before being picked up (like by a camera lense)AnswerI believe the answer is Filter.