the colors of optical combination in physics exper

1)Components Demo Box four high-power LED light ( white ,red, green , blue) 12V filter sheet ( red, green , blue) paper sheet ( red, green , blue) filter potentiometer Power supply (12 V ,with a switch) 2) Experiment A)To demonstrate the filtering effect of lights by transparent object B)To demonstrate the reflection of colored lights by opaque objects C)To demonstrate the theory of the composition of white by three primary colors D)To demonstrate the composition of other colored light by the two or three primary colors