Electromagnetism (HOME)
| Lecture 13 | Previous Lecture | Next Lecture |
Fresnel’s eqns. for non-magnetic, non-conductors. Phase relationships with E normal and E parallel to the POI. The Brewster angle.
Normal incidence.
Reflection and transmission coefficients.
Expressions for reflection and transmission coefficients (handout)
Rough example reflection/transmission plots (handout)
SOME WORKED EXAMPLES RELATING TO LECTURES 12 AND 13
What you need to know
You need to understand how to derive and apply Fresnel’s eqns. in order to obtain, for example, the results regarding the relative phase relationships between EOI, EOR and EOT. In particular, you should be aware of the significance of the Brewster angle and in what polarisation it may be observed (E parallel to POI).
You should be aware of the particularly simple form of the results in the case of normal incidence.
You need to know how the R(eflection) and T(ransmission) coefficients are defined (and that R + T = 1).
Reminder: you are not expected to memorise any of the general, detailed expressions for Fresnel’s equations or for the reflection and transmission coefficients.