Lesson: Radiative Power of Electromagnetic Radiation Physics

Students will be able to

• relate the irradiance, , of electromagnetic radiation at a point that is at a distance from a point source of electromagnetic radiation to the radiative power, , of the source, using the equation ,
• recognize that if the irradiances, and , of light from two sources are equal at a point at distances and from the sources, then it must be the case that ,
• recall that spectral irradiance is the ratio of the radiative power received at a point to the product of the unit area and unit wavelength.