what are required of chemicals which are put of touch light
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Answer:
Explanation:
Incandescent flashlights use incandescent light bulbs which consists of a glass bulb and a tungsten filament. ... Some high-power incandescent flashlights use a halogen lamp where the bulb contains a halogen gas such as iodine or bromine to improve the life and efficacy of the bul
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Explanation:
bulb contain helium gas
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