Correct option is A
A hologram is not a light source; it is a three-dimensional image created by the interference of light beams from a laser or another coherent light source. Holography is a technique that records the light scattered from an object and presents it in a way that looks three-dimensional. The key features of a hologram include its ability to display a 3D image and that it does not require a screen for projection, unlike traditional images. Lasers are typically used to create the hologram by splitting the beam into reference and object beams that record the light waves' interference patterns. These patterns contain all the information needed to reproduce the 3D image.
