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I know that infared is a range of frequencies in the electromagnetic spectrum with units of Hertz or Hz where 1Hz=1 oscillation/sec. the standard unit is also Hertz. A watt is a unit of power or rate of energy delivered. 1W=1kgm/s. the unit in standard is a footpound/s or horsepower. But i want to express this into an equation for infrared/watts over a period of time