Holography and photography are two different techniques to generate images.
Holography:
It is the technique used to generate 3-dimensional images using the phenomenon of Interference and diffraction of light. It uses monochromatic and coherent source of light and a hologram is needed to regenerate the image.
Photography:
It is the technique used to generate 2-dimensional images of an 3-dimensional object. In this light reflect from the object strike on the photographic film and react with the chemical coating of the film. A lens is needed to focus the object on the photographic plate.
Difference between Holography and Photography:
S.NO | Holography | Photography |
---|---|---|
1. | Holography is used to generate 3-dimensional images. | Photography is used to generate 2-dimensional images. |
2. | Phenomenon used in holography is interference and diffraction of light. | It uses reflection of light by the object to the photographic film. |
3. | Source of light should be monochromatic and coherent. | No special type of light source is needed. |
4. | No lens are required to generate the holograph. | Lens are required to focus on the object and generate the photograph. |
5. | Holography has high information capacity. | Photography has less information capacity than holography. |
6. | Multiple images can be superimposed together. | Multiple images can’t be superimposed together. |