In the dark of the night you can easily illuminate the path ahead of you thanks to the ingenious invention known as a flashlight. Flashlights are portable electric spotlights that emit light from a small light bulb or light emitting diodes. The light source is surrounded by small reflectors which direct the light through a clear lens.
Certain flashlights generate power through a hand crank or electromagnetic induction, but typically flashlights rely on batteries for their power. The working elements for a flashlight are contained in a protective housing. Flashlights are generally designed to be held by hand, but certain models used by miners and campers are designed to be mounted to a helmet.
Early versions of the flashlight were making a public appearance as early as 1899. The earlier models didnít hold currents for a sustained period of time and provided brief flashes of light. The briefness of illumination led them to being referred to as flashlights.
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