Holography is a technique that allows the creation of three-dimensional images, known as holograms. It works by recording light patterns reflected from an object onto a special medium, such as a photographic plate. When illuminated with a laser, the recorded light patterns reconstruct the image, making it appear three-dimensional. This technology relies on the principles of interference and diffraction of light. Holography has various applications, including in data storage, security, and art. It is also used in scientific research and medical imaging, providing detailed visual information that can enhance understanding in these fields.