An EM wave is normally incident on a boundary between two materials ($n_1$ is close to $n_2$). If the incident wave starts in material 1,

1. most of the wave is reflected back; very little of the wave transmits through material 1
2. some of the wave is reflected back; some of the wave transmits through material 1
3. very little of the wave is reflected back; most of the wave transmits through material 1
4. ???

Annoucements

• Quiz 5 (next Friday)
  • Construct the expression for plane wave given a description
    • Both complex and real expressions
  • Combine two plane waves and describe the resulting superposed wave

Claim: For a wave heading towards a boundary between two media at an oblique angle, $\omega_I = \omega_R = \omega_T$.

1. True
2. False

Claim: For a wave heading towards a boundary between two media at an oblique angle, at the boundary, $\mathbf{k}_I\cdot\mathbf{r} = \mathbf{k}_R\cdot\mathbf{r} \neq \mathbf{k}_T\cdot\mathbf{r}$.

1. True
2. False