How do laser lights work?

Answer 1

do you mean lasers? It's a little hard to explain on yahoo. You could try wikipedia, but even that probably won't be good enough.

basically, they are specially crafted to create light with the same wavelength and in phase. Draw a wavy line on a piece of paper. Then draw over that same line over and over again. It's kinda like that. I could explain in more detail but you would need to understand chemistry.

Answer 2

Within the fiction of Star Wars, the lightsaber "blade" is made by a very tight loop of highly focused energy, possibly a loop of plasma contained in a strong magnetic or other field which compresses the circular loop so much that it looks like a cylindrical bar. When deactivated, a lightsaber appears as a polished metallic handle, about 30 centimeters long, with an ignition button. They are carried at the waist in this fashion by belt clip, and can be drawn by hand or by the Force. Lightsabers have a distinctive hum when active. Some carry a "dead-man trigger" that deactivates the saber automatically if dropped.

To carry a lightsaber is a reflection of confidence, dexterity, and attunement to the Force. Although use of the lightsaber is not strictly reserved to Jedi (see General Grievous), the only others widely known of being capable of handling the difficult weapon are the Sith: Darth Maul, Darth Tyranus (Count Dooku), Darth Vader and Darth Sidious (Palpatine), as well as other Sith characters in the Expanded Universe.