Laser (light amplification by stimulated emission of radiation) is transfer of light as a straight bundle in a single wave length.
It is absorbed by melanin pigment in hair follicle.
All lights are in a single wave length in laser light. Laser light moves without being distributed as it is composed of photon particles which proceed at the same moment and at the same phase.
Laser epilation is the modern epilation method today. Various laser types and devices are available.
Hair in face, upper arm, umbilicus which are not completely eliminated or which cannot be seen by laser may be made invisible with laser. Most of this hair falls.
This is not a method used for completely removing hair.
The hair that cannot be seen with Alexandrite, Nd Yag laser, Diot laser is applied Q-switched Nd yag laser. Hair falls however grows again.
It is a proper method for every skin type and in every season.