Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.
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12:13, 27 февраля 2026Экономика
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BAS takes on up to 150 new recruits for Antarctica each year. While specialist science and engineering roles form the backbone, around 70% of the jobs are the operational roles required to keep the stations functioning.