How do laser pointers work?
1 Answer
Laser pointers generate light in a laser diode and then put the laser beam through one or more mirrors.
Explanation:
Laser light is produced when you bounce light back and forth between two mirrors, in certain special mediums.
See:
Minute Physics: How lasers work
Here is the inside of a typical inexpensive red laser pointer:
And here is the inside of an expensive, green laser pointer:
In general, you generate the laser light in the Laser Diode (powered by batteries) and then put the light through one or more lenses to make the beam wider.
