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A flashlight or electric torch (Commonwealth English), usually shortened to torch, is a portable hand-held electric lamp. Formerly, the light source typically was a miniature incandescent light bulb , but these have been displaced by light-emitting diodes (LEDs) since the early 2000s.
A mechanically powered flashlight (UK: mechanically powered torch) is a flashlight that is powered by electricity generated by the muscle power of the user, so it does not need replacement of batteries, or recharging from an electrical source. There are several types which use different operating mechanisms.
In 2013, Makosinski won the Google Science Fair for her invention of the thermoelectric flashlight. [8] [9] The device relies on the thermoelectric effect using Peltier tiles. It is hollow to increase convection currents. [5] In 2018 she was in negotiations to commercially manufacture and distribute the flashlight.
A solar flashlight with built-in radio. Solar powered flashlights (American English) or solar powered torches (British English) are flashlights powered by solar energy stored in rechargeable batteries. Most of these flashlights use light-emitting diodes lamps [1] [2] since they have lower energy consumption compared to incandescent light bulbs. [3]
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LET’S UNPACK THAT : We Brits are known for our devastating smiles – and not in a good way. Lydia Spencer-Elliott talks to the experts to find out the mistakes holding us all back from the ...
We turn so many people’s livelihoods into a [90-minute film] that people watch, and then say, ‘I think I’ll go and make a toasted sandwich now.’ It’s crazy!”