Derive Fresnel equations. Define reflectance and transmittance.
Understand the Problem
The question is divided into two parts. First, it asks for the derivation of Fresnel equations. Second, it asks for definitions of reflectance and transmittance.
Answer
Fresnel equations describe light reflection and transmission between mediums. Reflectance is the ratio of reflected to incident power. Transmittance is the ratio of transmitted to incident power.
Fresnel equations calculate the reflection and transmission of light when moving between different optical mediums. Reflectance is the ratio of reflected power to incident power. Transmittance is the ratio of transmitted power to incident power.
Answer for screen readers
Fresnel equations calculate the reflection and transmission of light when moving between different optical mediums. Reflectance is the ratio of reflected power to incident power. Transmittance is the ratio of transmitted power to incident power.
More Information
The Fresnel equations consider the polarization of light and the angle of incidence to determine the amplitude and phase of the reflected and transmitted light.
Tips
A common mistake is not considering the polarization of light when calculating reflectance and transmittance using Fresnel equations. Light can be polarized either parallel (p) or perpendicular (s) to the plane of incidence, and each polarization will have different reflection and transmission coefficients.
Sources
- Fresnel equations - Wikipedia - en.wikipedia.org
- Fresnel Equations: What are they? (Derivation & Explanation) - electrical4u.com
- Fresnel Reflectance and Transmittance - pypolar - Read the Docs - pypolar.readthedocs.io
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