Hi, I need to make a demonstration that shows that white light is composed of different colors. I do not have a prism, and will not be able to obtain one in time. I have a white LED flash light, and I tried some improvisations with different objects (bottles, glasses etc), but none seems to decompose the white light. This led me into thinking, is light produced by white LED somehow different from the ordinary white light? Maybe you can think of some other improvisation that demonstrates the effect I need? Thank you for the help.