How is holography different than photography.
|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.|