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blue
black because blue light cannot pass through a yellow filter
cyan light
It depends on what kind of filter, e.g. a blue filter absorbs everything except blue light, so only blue light comes out, which is why the filter looks blue, and is referred to as a "blue filter".
Red. A primary filter allows only one colour through.
Everything but red.
you stupid colour blind its purple man
green
green
A cyan colored surface will reflect any blue or green light that is incident. The green filter will remove all colors of light passing through it except green. The book is illuminated with only blue light. Draw your conclusion.
red because red through red makes red! ;)
red apples