Visible light is used to create visual effects.

Using lasers in the visible spectrum, with the help of optical elements which cause reflection refraction, and dispersion, it is possible to create three dimensional sculptures which are moving in space.

In order to see the laser beams in space we need a medium which scatter light in all directions. The standard medium is smoke which contains very small particles suspended in the air. When using higher power visible lasers, it is possible to see the reflections from the particles in "standard" air, without the use of smoke.

The best lasers for these application are the Argon Ion and the Krypton Ion lasers.

A "wall" (plane) of light can be easily created by a rotating or vibrating mirror.
By using multiple rotating and/or vibrating mirrors, controlled by computers, it is possible to design complicated shapes which appear in space.

Combing Holography (see chapter 10) with high power visible lasers will enable new type of virtual sculptures in space.