JOP210H1 Chapter Notes -Dennis Gabor, Photographic Emulsion, Wind Wave
Document Summary
Holography is an application of the wave theory of light. First conceived by dennis gabor in 1947. Idea to combine two sets of coherent light beams. To record interference pattern produced by their interaction in a photographic emulsion. To do so in such a way that the plate would contain complete (holo-graphic) information about a scene that could be reconstructed when viewed with the proper lighting. Light waves and water waves are remarkably analogous. Light actually travels as an electromagnetic field through a vacuum, but we can adopt a simplified model for our study of holography. The time rate of the up-and-down motion of a wave is the frequency. The vertical displacement above or below the normal level of the wave is the displacement. The amplitude of the wave is the maximum vertical displacement from the zero level. Crest-on-crest addition of waves is constructive interference.
