Well, This isn't a homework , but today in class we talked about how lights shining on a object produce different color. But I do not know what color it produces?? I know that Primary colors of light are red green and blue. Secondary are magenta and cyan and yellow. If we have a red cherry on the desk and we shine yellow light, Why does it produce or reflect red?? Teacher said it reflects green but how? And vice versa if we shine a red light into a yellow banana, we get red and if we shine blue, we get black.. why?? Can someone help me understand why these colors are produced and how i can tell??