Did you know...?
The word laser is actually an acronym? It stands for “light amplification by stimulated emission of radiation.” There are 4 classifications of laser based on their wavelength and potential energy output:
- Class I: Grocery store scanners and laser printers
- Class II: Laser pointers (400-700 nm wavelength)
- Class III: Laser lights shows and some types of laser therapy (eg, superficial lesions and wounds); this class is subdivided into IIIa (visible light) and IIIb (nonvisible light)
- Class IV: Medical/surgical and industrial lasers (800- 1000 nm wavelength)