Which term refers to the total quantity of energy in laser therapy?

The term that refers to the total quantity of energy in laser therapy is Joules. In the context of laser therapy, Joules measures the energy output of a laser during treatment. It's a key concept because the effectiveness of laser therapy can depend on the amount of energy delivered to the tissues being treated.

Watt, the unit of power, denotes the rate at which energy is used or produced, but it does not represent the total energy itself. Hertz measures frequency, which is related to how many cycles per second occur in waves, but it does not pertain to energy quantity. Nanometers measure wavelength in the electromagnetic spectrum, including light, but again do not quantify energy as Joules does. Thus, understanding Joules is crucial for evaluating the energy applied in laser treatments and for ensuring appropriate dosages for safe and effective therapy.