Tuesday, December 17, 2019
Thursday, December 12, 2019
Latest political map of India
All schools are advised to display and use only the latest political map of India for all the purposes in their
premises. The map is available at http://www.surveyofindia.gov.in
Wednesday, December 4, 2019
Happy Birthday Werner Heisenberg
Werner Heisenberg was born on 5th December, 1901, at Würzburg.
Heisenberg’s name will always be associated with his theory of quantum mechanics, published in 1925, when he was only 23 years old. For this theory and the applications of it which resulted especially in the discovery of allotropic forms of hydrogen, Heisenberg was awarded the Nobel Prize for Physics for 1932.
In 1929 Heisenberg spent some time in India as the guest of the celebrated Indian poet Rabindranath Tagore, with whom he had long conversations about science and Indian philosophy. This introduction to Indian thought brought Heisenberg great comfort, he told me. He began to see that the recognition of relativity, interconnectedness, and impermanence as fundamental aspects of physical reality, which had been so difficult for himself and his fellow physicists, was the very basis of the Indian spiritual traditions. ‘After these conversations with Tagore,’ he said, ‘some of the ideas that had seemed so crazy suddenly made much more sense. That was a great help for me.
His new theory was based only on what can be observed, that is to say, on the radiation emitted by the atom. We cannot, he said, always assign to an electron a position in space at a given time, nor follow it in its orbit, so that we cannot assume that the planetary orbits postulated by Niels Bohr actually exist. Mechanical quantities, such as position, velocity, etc. should be represented, not by ordinary numbers, but by abstract mathematical structures called “matrices” and he formulated his new theory in terms of matrix equations.
Later Heisenberg stated his famous principle of uncertainty, which lays it down that the determination of the position and momentum of a mobile particle necessarily contains errors the product of which cannot be less than the quantum constant h and that, although these errors are negligible on the human scale, they cannot be ignored in studies of the atom.
Sunday, December 1, 2019
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