In this topic you will learn about colored light. When white light passes through a prism, a rainbow band of colors can be seen. A prism spreads the colors out by refracting each one at a different angle. The band of colors produced when light passes through a prism is a spectrum. The color of an object depends on what happens as light hits it.
Objects absorb some colors and reflect others.
The colors you see are the colors reflected by the object. A green leaf absorbs all colors except green. It reflects green, so green is the color you see. A black material absorbs all colors and reflects none. A white material reflects all colors.