Theodore Maiman made the first laser operate on 16 May 1960 at the Hughes Research Laboratory in California, by shining a high-power flash lamp on a ruby rod with silver-coated surfaces.
Holography is aunique photographic image without the use of a lens.
It is a recording of aninterference patternthat uses diffraction to reproduce a 3D light field.
This recorded interference pattern actually contains much more information than a focused image and enables the viewer to view a true 3D image that exhibits parallax.
That is, the image will change its appearance if you look at it from a different angle,
