Which term quantifies the portion of incident energy that is reflected?

Which term quantifies the portion of incident energy that is reflected?

• A. Absorption coefficient
• B. Transmission coefficient
• C. Intensity Reflection Coefficient (IRC)
• D. Incident intensity

Answer: (C)

The main idea is to describe what fraction of the incoming energy bounces back at a boundary. The term that captures this is the Intensity Reflection Coefficient. It is the ratio of the reflected intensity to the incident intensity, a dimensionless number between 0 and 1. For example, if 25 units of energy are reflected from 100 units arriving, the IRC is 0.25. The absorption coefficient pertains to how much energy is absorbed within the material, not what is reflected. The transmission coefficient describes the portion that passes into the second medium, not what reflects. Incident intensity is just the incoming energy flux, not a fraction.

The main idea is to describe what fraction of the incoming energy bounces back at a boundary. The term that captures this is the Intensity Reflection Coefficient. It is the ratio of the reflected intensity to the incident intensity, a dimensionless number between 0 and 1. For example, if 25 units of energy are reflected from 100 units arriving, the IRC is 0.25. The absorption coefficient pertains to how much energy is absorbed within the material, not what is reflected. The transmission coefficient describes the portion that passes into the second medium, not what reflects. Incident intensity is just the incoming energy flux, not a fraction.