When light passes through a prism of glass, 1. refraction changes the directions of different colors or wavelengths of light. 2. the prism absorbs colors from different parts of the broad beam coming out of the prism, leaving the complementary colors that we see. 3. different colors are caused by multiple reflections within the prism and the resulting interference between the beams. 4. the prism adds colors to different parts of the outgoing and broadly scattered beam?
