Holography is a technique that allows the recording and reproduction of three-dimensional images, known as holograms. It works by capturing the light scattered from an object and storing it in a way that can later recreate the image in three dimensions. This process involves the use of lasers, which provide coherent light necessary for creating detailed holograms. The resulting holograms can be viewed with the naked eye and appear to change perspective as the viewer moves, giving a realistic sense of depth. Holography has applications in various fields, including art, data storage, and security, where it is used to create secure identification cards and currency.