Interaction between power and depth (with the same wavelength) in physical therapy

The ability of the laser to penetrate to depth is often incorrectly attributed to only the wavelength.

In reality, the power has a fundamental role in the therapeutic action of the laser on tissues.

It is known that the power (Watts) represents the quantity of energy which can be transferred in one unit of time (1 Watt = 1 Joule for 1 second). Energy reduction is inversely proportional to the reference depth.

Greater power transmits more energy, overcoming the natural dispersion of the laser and reaching the seat of the injury (see diagram opposite).

The more energy transferred, the greater the quantity which can be assimilated by the tissues.