Difference beween holography and photography

Hello Friends, Last time I have discussed holography and written that it is a two-stage process. The first stage is the recording of the hologram in the form of an interference pattern and in the second stage, the hologram acts as a diffraction grating for the reconstruction beam and the image of the object is reconstructed for the hologram.

Do you know what is the difference between holograms and photographs? If not, then let us discuss the difference between a photograph and a hologram:

Difference between Holography and Photography

A Hologram Example

1. In photography, only intensity is recorded so photography produces a two-dimensional picture of the object whereas in holography, both intensity, as well as phase of light wave, is recorded, thus holography gives a three-dimensional picture of the object.

2. Negative is prepared first in photography whereas in holography no negative is required. The hologram is negative and the image it gives is positive.

3. If the hologram is broken into parts, each part is capable of reconstructing the entire object. But in photography, the destruction of even a very small portion of negative or photography results in an irreparable loss of information.

4. Holography has high information capacity as compared to photography.

These are the major differences between a hologram and a photograph. If you know more, please share in the comments section.


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