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Fluorescent Lamps Explained with Quantum Physics - A Level Physics

This video introduces fluorescent lamps and explains them with quantum physics for A Level Physics. These common light fittings are used because they are relatively cheap and highly efficient. A glass tube is filled with mercury vapour at a low pressure. When excited by electrons the mercury atoms become ionised, losing an electron. As the electron returns to its ground state, it then emits an ultraviolet photon. A phosphor coating on the inside of the tube then absorbs the UV photon, finally emitting a range of visible photons which we see as white light. Thanks for watching, Lewis This video is recommended for anyone studying A Level Physics in the following exam boards: AQA CIE Edexcel Edexcel IAL Eduqas IB OCR A OCR B WJEC _____________________________________ MY PHYSICS WEBSITES Find even more videos organised by exam board and topic at: GCSE Physics Online ► https://www.gcsephysicsonline.com A Level Physics Online ► https://www.alevelphysicsonline.com MY YOUTUBE CHANNEL Your support in watching this video has been invaluable! To contribute towards the free videos on YouTube, make a small donation at: ► https://www.paypal.me/physicsonline FOLLOW ME ► https://www.youtube.com/physicsonline... ►   / physicsonline   ►   / gcseandalevelphysicsonline   #physicsonline