Holograms
- January 24, 2022
- Posted by: OptimizeIAS Team
- Category: DPN Topics
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Holograms
Subject – Science and Tech
Context – Netaji 3D Hologram statue at India Gate
Concept –
- 3D Hologram technology is not commonly used in India and this statue of Netaji, the Azad Hind Fauj founder, will be one of its kind in the country.
- This technology uses projectors to create a virtual three dimensional image. In simple terms, a hologram is just a projection that seems realistic.
- Unlike a conventional film on a standard screen, a 3D hologram can be viewed from all sides. This means that the observer can walk around the projected image, providing a realistic experience.
- What differentiates a 3D hologram from virtual reality or a 3D video is that it can be seen by everyone without wearing 3D glasses.
- These holograms are formed by interference of light beams that reflect real physical objects.
- To illuminate a realistic 3D hologram, it first has to be specially designed or it should be recorded professionally using lasers.
- Apart from the projectors, a transparent holographic screen is also needed to project 3D holograms. The holographic screen is a key element on which the quality of the hologram depends.
- Holography is done using laser beams, the properties of interference and diffraction, light intensity recording, and illumination of the recording.
- The Hungarian-British physicist Dennis Gabor was awarded the Nobel Prize in Physics in 1971 “for his invention and development of the holographic method”.
To know more about Holograms, please refer September 2021 DPN.
How do holograms work?