What does joules per area equal?

Fluence is defined as the energy delivered per unit area, which is expressed in joules per square meter (J/m²). This measurement is critical in laser applications because it quantifies how much energy the laser beam deposits onto a specific area during treatment. Understanding fluence is essential for ensuring that the correct energy levels are applied for various procedures, such as aesthetic or medical laser treatments. Factors such as spot size and pulse duration also play significant roles in how fluence affects outcomes in laser applications.

Intensity, on the other hand, refers to the power per unit area but is not directly expressed in joules per area; it is often measured in watts per square meter (W/m²). Power is a measure of energy transfer over time, typically represented in watts (J/s), and temperature relates to the degree of thermal energy present in a material, measured in degrees Celsius or Kelvin. Thus, fluence is the most accurate term associated specifically with joules per area.