The SI unit for intensity is the watt per square meter (W/m?). Intensity is a measure of the power of radiation or energy transfer per unit area. In the context of electromagnetic radiation, such as light, intensity refers to the amount of energy passing through a unit area per unit time. This unit is used to measure the intensity of various types of radiation, including visible light, ultraviolet light, and infrared radiation. It is also used to measure the intensity of sound waves, which is measured in watts per square meter in air. Overall, the watt per square meter is a commonly used unit for expressing the intensity of energy transfer or radiation in various scientific and engineering applications.
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