The Laser Tool fires a [https://en.wikipedia.org/wiki/Laser laser] into the simulation in the direction of the cursor. If the laser intersects with an object with a [[Surface
Properties|simulated surface]], the laser will impart energy into the object, heating its surface. The rate at which this energy will be transferred depends on the laser's power and radius.
A real laser works by adding energy to a [https://en.wikipedia.org/wiki/Active_laser_medium gain medium], such as a crystal or gas. This energy, at a specific wavelength, drives [https://en.wikipedia.org/wiki/Stimulated_emission stimulated emission] in the medium and produces a narrow beam of light.