LASER What is it?
"LASER is an acronym which stands for Light Amplification by Stimulated Emission of Radiation.
The energy generated by the laser is in or near the optical portion of
the electromagnetic spectrum (see Figure 1). Energy is amplified to
extremely high intensity by an atomic process called stimulated
emission. The term "radiation" is often misinterpreted because the term
is also used to describe radioactive materials or ionizing radiation.
The use of the word in this context, however, refers to an energy
transfer. Energy moves from one location to another by conduction,
convection, and radiation. The color of laser light is normally
expressed in terms of the laser's wavelength. Laser light is nonionizing and ranges from the ultra-violet (100 - 400nm), visible (400 - 700nm), and infrared (700nm - 1mm)." 1
1.) Erconia - Laser Clasifications