The photographer's dilemma: Does the light meter work?

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Published on Premiered Dec 21, 2024
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Mercury is a liquid metal at room temperature, known since Ancient Greece. Its name pays homage to the Roman god Mercury, due to its fluidity, and the chemical symbol Hg comes from the Greek term hydrargyrum, which means 'liquid silver'. This metal is widely used in the manufacture of laboratory instruments and batteries, taking advantage of its properties such as fluidity, electrical conductivity and chemical reactivity. However, due to its toxicity, its use has been increasingly restricted. Mercury toxicity occurs when it binds to essential enzymes and proteins, inactivating them irreversibly and causing serious harm to health. It is found in hair, blood, breast milk and the brain, and can be transferred to fetuses. In Brazil, ANVISA prohibits the manufacture and use of thermometers and sphygmomanometers containing mercury, in addition to banning products such as fluorescent lamps and batteries that contain this metal. To reduce risks, it is essential to look for alternatives, such as silver oxide, alkaline and zinc-air batteries. Watch the video and learn more about these options!

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