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Materials used for recording holograms include photographic emulsions, dichromated gelatin, photopolymers, and thermoplastics, which are sensitive to light intensity and can record interference patterns.

Laser holography uses laser light to create holograms because it's coherent and monochromatic, allowing for interference patterns that record the object's light field with high precision.

Unlike traditional photography which captures a two-dimensional image, holography captures the light field, including phase and intensity information, to reproduce a three-dimensional image.

Holography is a photographic technique that records the light scattered from an object and then presents it in a way that appears three-dimensional.

Holograms are viewed by illuminating them with a coherent light source (like a laser), and the viewer must be positioned in the correct angle relative to the hologram to see the three-dimensional image.

Off-axis holography involves the angle between the reference beam and the object beam being large enough so that the holographic recording includes information about the phase of the light waves, allowing a three-dimensional image to be re-constructed.

A hologram is the physical record of a holography process, typically manifesting as a two-dimensional surface that shows a fully formed three-dimensional image when viewed correctly.

Holography relies on the principles of interference and diffraction to record and reconstruct the light waves scattered from an object, allowing the viewer to see the original object's depth and perspective.

The reference beam in holography is used to interfere with the object beam reflected off the object being recorded. This interference pattern is what is captured and later used to recreate the object's wavefront.