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Showing posts with the label LIGHTING : Non-visual optics UV

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Seville

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SEVILLE Sevilla After living up to some wonderful moments at Granada, the birthplace of the renowned Spanish poet and playwright Federico Garcia Lorca, we decided to further our coadventure through the heartland of the southern Iberian Peninsula, composed of lowlands, mountains and valleys. You’ve got it right. To arrive at Seville, we traversed the fascinating Spanish heartland. The landscape presented some vistas composed of rustic plains, lowlands, winding roads through the Sierra and then vast stretches of olive orchards. About 200 years back, a couple of decades after Napoleon’s army plundered and destroyed parts of Alhambra, an American diplomat and writer, Washington Irving and his Russian counterpart traversed the path from Seville to Granada. It was highly adventurous then, because of the fact that the transport system at that time was horse-drawn carriages and muleteers. It was such that they could ‘wander among the romantic mountains of Andalusia’ (Tales of Alhamb...

An Invisible War – Overview on the role of UV-C in fighting COVID-19

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UV-C vs COVID 19 The invisible pathogen COVID 19 has suddenly taken our entire planet by surprise at the beginning of 2020. The invasion was so sudden that even the World Health Organization (WHO) took time to declare this as a pandemic. At a time when the entire world is trying to arrive at plausible solutions to arrest the spread of this rampaging virus, our Lighting fraternity has joined the fight by concentrating more on studies of non-visual impacts of light. An invisible part of the optical radiation spectrum, ultraviolet radiation has more energy than its visible counterpart due to its shorter wavelengths. The ultraviolet spectrum comprises UV-A (400 nm to 315 nm); UV-B (315 nm to 280 nm); UV-C (280 nm to 100 nm) – classification as defined by CIE. Whenever ultraviolet radiation is used for germicidal purposes, it is known as GUV (Germicidal Ultraviolet ) radiation. It has been found to be highly effective in deactivating or killing virus...