I = P / ACopy formulaPlain textCopy formatsUnicodeI = P / ACopyPlain TextI = P / ACopyLaTeXI = P / ACopyHTMLI = P / ACopyHTML EntitiesI = P / ACopyVariablesIintensityW/m²Paverage powerWAaream²Reference detailsSubjectWaves & OpticsTopicsoundPlain textI = P / A