What We Measure, Part 2: Transmittance

Previously, we reviewed the first of the basic units we measure: reflectance.¬†We presented a simplified but rigorous definition of the way we quantify the flux reflected from a surface. In a similar way, this post addresses transmittance, which describes the … Read More

What We Measure, Part 1: Reflectance

The material properties we measure are reflectance and transmittance, or more typically, reflectance factor and transmittance factor. Transmittance and reflectance are the more general measurements, but as we will see below, when we compare a sample and a physical reference … Read More