In one version, developed by Frederic Eugene Ives, the subject is clicked from two different spots roughly 7 cm apart. But instead of normal lighting, the images are made under a red light, a green and a blue light separately.
When the six pictures are combined in a special instrument called the Kromskop also designed by Ives , the result is a coloured replica of the black and white picture. If there are black and white transparencies — a. In the sense that the sky would appear blue, the trees would seem green and the Taj, a particular shade of white. Using colour photographs will be no good either because the early variant of the technology was based on dyes. This meandering path for assessing colour comes with a slew of problems.
But Arya says that even if we knew all these variables, it will be difficult to rule out colour bias. There is no similar standard for black and white photography. While photographs only serve as a proxy to what-could-have-been-the-colour of the monument, the marble itself has all the required colour information.
When the marble surface is eroded by acid rain, the latter creates tiny microscopic sites where soot, rust, algae and other discolouring agents can gain a foothold, Sambuddha Misra, a geochemist at the Indian Institute of Science, Bengaluru, explained. Yet the rock below the discoloured coating is safe. All the marble used to build the Taj came from a site in Rajasthan called Makrana.
It is conceivable that unexposed marble pieces from that region can be used to compare. Other monuments that stand on the banks of the river Yamuna, such as the Tomb of Itimad-ud-Daulah, the Mehtab Bagh, and portions of the Agra Fort, too, have been affected by these insect attacks.
The Parliamentary Standing Committee on Science and Technology, Environment and Forests in its nd Report on the effects of pollution on the Taj Mahal, presented to Rajya Sabha and Lok Sabha in , pointed out that air pollution has become a concern not only for reasons of health of the common man, but also for the danger it poses to cultural heritage.
Rampant construction and encroachments compound the problem. What can foreign experts do to save the Taj that the ASI cannot? The experience shows that the situation, instead of getting remedied, has worsened, and has reached a critical point. It needs thorough investigation and solutions from renowned experts and institutions working in the field of conservation and preservation. Since the Taj Mahal is a World Heritage Site, if an opinion is sought from both national and international experts and institutions, it will give a broader perspective and vision to protect the monument.
How is the situation today compared to what it was when you first brought out the problems with the Taj? Tickets consistently sold out for this recorded occasion, so attempt to book prior. The extraordinary surface of the marble change its shading at particular timings of the day. M — Before Sunrise At 4 '0' clock morning with the sun beams gradually develop precisely before the day break the Taj Mahal isn't obvious as of now.
M — After Sunrise Soon after the dawn, Taj Mahal glances pink in shading for a brief timeframe, the gentle sun rays hit the white marble and reflect pink shading.
Full moon night Taj Mahal in the full moon night is a fantasy works out as expected for each voyager. By: Suvarna Gupta. Related News. Should Notebook Computers Replace Textbooks? The river pollution, however, attracted a species of insect that has contributed to the degradation of the Taj Mahal's surfaces. The insect problem has been known for at least two years, when officials from the ASI first connected the green traces in the Taj Mahal's marble walls and red stones to the presence of the bugs.
The insect was later identified as being a type of Goeldichironomus, which somewhat resembles mosquitoes.
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