Concave mirrors in order for the light to be concentrated so that it points forward.
Concave on the inside part. Convex on the outer.
Concave Mirrors
so the dentist can see inside your mouth
The popular energy of flashlight are Rechargeable Li-on battery, Alkaline battery.
A dynamo flashlight works by producing its own electricity. The flashlight has a crank that is turned by the operator. The crank runs a small generator inside that produces enough electric to run the flashlight.
Concave mirrors are used in flashlights to reflect and focus light rays emitted from the light bulb. The curved surface of the mirror helps to redirect the light beams outward, creating a more intense and focused beam of light. This allows for better illumination over long distances.
The inside of a flashlight usually contains a light bulb or LED, a reflector to direct the light forward, and batteries to power the light source. There may also be a switch mechanism to turn the flashlight on and off.
The heating element found inside a flashlight bulb is typically made of tungsten, which has a high melting point and can withstand the heat generated in the bulb. Nechrom is not a common material used in flashlight bulbs.
-- auto headlights -- front end of a flashlight -- shaving mirror -- satellite TV dish
A flashlight can also get energy from batteries or rechargeable batteries to power the light source.
real
Concave Mirrors, so that the light can be concentrated and so that it points forward. This is how we are able to see using a flashlight beam.:) Catherine