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The Soviet Union launched a number of missions to explore Venus – this probe was from an earlier flight
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However, she empathises with fans who aren't able to make it and believes he will bring it back to the UK.
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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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