REYANNA LAMBIE
Flashlights
How Does it Work?
Legend (Diagram B):
1. Case- The contour, the outer material surrounding the flashlight.
2. Contacts- The metal parts of a flashlight that is used to conduct the electricity throughout the flashlight.
3. Switch- The part of the flashlight that turns on and off the flow of electricity producing light.
4. Reflector- A plastic containing a layer of aluminum which redirects light so that a parallel beam can be produced.
5. Lamp- The light source, an LED that glows when electricity flows through it.
6. Lens- The clear plastic part that protects the LED light located at the front of the flashlight.
7. Batteries- The power source of the flashlight, where the electricity originates from.
When the switch is in the ON position, the contact strips are connected creating a flow of electricity originating from the battery. A flat contact strip on the opposite side of the switch runs to the lamp which produces an electrical connection. To complete the circuit there is another part connected to the lamp and the battery. When the switch is in the OFF position the contact strips are separated therefore there is no complete path for the electrical current and no light is produced.