It splits white light up into the colors of the visible spectrum, but if the colors go through another prism, they turn into white light again.
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Yes, because if it did not, then it would be invisible.
Enter the light perpendicular to the hypotenuse of the Prism above or below the center of the hypotenuse. The light will reflect off the two non-hypotenuse sides and reflect back out in the opposite direction, 180 de Save grees.
light is needed to reflect an image off a mirror...no light no reflection
Any smooth surface will reflect light. The better question is "How much light does each kind of smooth surface reflect?"
yes.