How is holography different than photography.
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1 Answer
| Photography | Holography |
|---|---|
| coherent light not needed | Monochromatic and coherent light is,necessary |
| Virtual image is not seen | Virtual image is seen |
| Only intensity is recorded | Intensity and phase both are recorded |
| 2-dimensional image | 3-dimensional image |
| From a torn or shattered photograph, the,image cannot be reconstructed | The image can be reconstructed from even, a small fragment of the hologram |
| Information of each point of the object, is recorded at a correspondence point on the image. Hence there is a point to,point correlation between the object and the image | Information of the entire object is, coded at each point of the image. |