In our analogy of waves on strings to E&M waves, we said that that a light string corresponded to a (fast, slow) EM media and a heavy string corresponded to a (fast, slow) EM media. 1. fast; slow 2. slow; fast 3. slow; slow 4. fast; fast Note: * Correct Answer: A
For our reflected and transmitted waves, how many unknowns have we introduced? $$\mathbf{E}_R = \widetilde{E_R}e^{i(k_Rz-\omega_Rt)}\hat{n}_R$$ $$\mathbf{E}_T = \widetilde{E_T}e^{i(k_Tz-\omega_Tt)}\hat{n}_T$$ 1. 2 2. 4 3. 8 4. 12 5. None of the above Note: * Correct answer: D * It's about 12.
For our reflected and transmitted waves, how many unknowns have we introduced? $$\mathbf{E}_R = \widetilde{E_R}e^{i(k_Iz-\omega_It)}\hat{n}_I$$ $$\mathbf{E}_T = \widetilde{E_T}e^{i(k_Tz-\omega_It)}\hat{n}_I$$ 1. 2 2. 4 3. 8 4. 12 5. None of the above Note: * Correct answer: A
An EM wave is normally incident on a boundary between two materials ($n_1 \ll n_2$). If the incident wave starts in **material 1**, 1. most of the wave is reflected back; very little of the wave transmits through material 2 2. some of the wave is reflected back; some of the wave transmits through material 2 3. very little of the wave is reflected back; most of the wave transmits through material 2 4. ??? Note: * Correct Answer: A
An EM wave is normally incident on a boundary between two materials ($n_1 \ll n_2$). If the incident wave starts in **material 2**, 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. ??? Note: * Correct Answer: A
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. ??? Note: * Correct Answer: C