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Q & A: Flashlights

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Most recent answer: 10/22/2007
How does a flashlight work
- Anonymous
There are 2 important parts to a flashlight. The first part is the battery and switch. When you flip the switch or press the button, it connects the battery to the light bulb. That way, you save energy.

The more interesting part is the light bulb. Inside the light bulb is a tiny wire of a special material called tungsten. When electricity goes through the wire, it heats up and sends out a lot of light in all directions. Some of the light goes backwards into the handle so flashlights have a metal reflector to bounce that light back forward. That way, none of the light is wasted.


(published on 10/22/2007)

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