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Geography – Hunga Tonga Volcanic Eruption
Hunga Tonga Volcanic Eruption
A massive volcanic eruption in the 21st century
Hunga Tonga Volcanic eruption was one of the most powerful explosions of the 21st century. On 14 January 2022, a very large eruption began on Hunga Tonga–Hunga Haʻapai, an uninhabited volcanic island and submarine volcano of the Tongan archipelago in the southern Pacific Ocean. The eruption reached a powerful climax the next day, 15 January. Hunga Tonga is 65 km (40 mi) north of Tongatapu, the country’s main island, The tremendous shockwaves caused by the eruption of Hunga-Tonga-Hungapai in Tonga were also felt across India, according to the Indian Meteorological
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Chemistry – 2021 Nobel Prize
Nobel Prize for Chemistry
David MacMillan and Benjamin List were awarded the 2021 Nobel prize (Chemistry) for the development of assymetric organocatalysis which is a great tool for building molecules . Organocatalysis is the use of certain organic molecules that act as catalyst in chemical reactions via catalytic activation . Organic catalysts are characterized by a stable skeleton of carbon atoms over which chemical groups of greater reactivity can attach . It is highly efficient , eco-friendly and inexpensive to produce which can even help in manufacturing new pharmaceuticals .
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National Science Day
Nobel Prize for Chemistry
National Science Day is celebrated every year on February 28, the day when CV Raman discovered the Raman Effect, a phenomenon in spectroscopy. The theme of the National Science Day 2022 is, “integrated approach in science and technology for a sustainable future”
CV Raman discovered the Raman Effect in 1928 while working in the laboratory of the Indian Association for the Cultivation of Science, Kolkata, which helped him in winning the prestigious Nobel Prize in 1930.
About Raman Effect: Raman Effect, change in the wavelength of light that occurs when a light beam is deflected by molecules. When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light; its presence is a result of the Raman Effect. The phenomenon is named for Indian physicist Sir Chandrasekhara Venkata Raman, who first published observations of the effect in 1928. (Austrian physicist Adolf Smekal theoretically described the effect in 1923. It was first observed just one week before Raman by Russian physicists Leonid Mandelstam and Grigory Landsberg; however, they did not publish their results until months after Raman.)