As you can see from the picture above, visible light consists of specific color spectrum.
Different wavelength lasers also have different side-effects such as visibility, radiation and generated heat.
They will be briefly explained in further posts.
Here is an example of what different wavelength laser beams might look like.
Note: all of these are handheld laser pointer beams and not DPSS style lasers.
Important specifics to consider when purchasing a handheld laser: