Lesson 3 : Radiometry and Photometry

The difference between radiometry and photometry is that radiometry includes the entire optical radiation spectrum (and often involves spectrally resolved measurements),
while photometry deals with the visible spectrum weighted by the response of the eye.

Video - 1

In this lesson, we learn about the science of electromagnetic radiation measurements. Here we explore the definition of radiometry and photometry and its units.

Video - 2