What is holography?

Holography
Have you ever seen an exhibit or a movie in which a three-dimensional fig¬ure seemed to appear front nowhere? The effect may seem like magic, but it is more likely that the image is a product of holography. Holography is a technology that uses lasers to make the three-dimensional image called a hologram.

Hologram Uses 

 Holograms have many applications. They are now used as special effects in movies and plays. Holograms may someday be used to produce three-dimensional television.
Because they are difficult to duplicate, holograms are used as security devices. For example, some credit-card companies now put holograms on their credit cards. The holograms help to prevent the forgery of credit cards.
Holograms can also be used as educational tools. For example, holograms can be used to display a three-dimensional image of internal body organs. Medical students can use the images as a model to study the human body.