No two pieces will give you a view that is exactly the same. However, you can shoot several different holograms on the same piece of film. Each holographic exposure can be shot with a different color laser if, for example, you are making a multi color image of red, green, and blue. A color hologram can also be made with a single laser using tricks of the trade like emulsion swelling or multiple reference angles. A mplification through S timulated E mmission of R adiation.
Light is a wave.
We see differnt sizes of light waves as different colors. Its something like the sizes of the strings of a harp making different musical notes. The largest strings of a harp make the lowest pitch notes and the shortest strings make the highest pitched musical notes. A rainbow is like a harp with strings of light. The largest visible light waves are called red .