Question

6. In Grifiths 9.3.2, he drew Ei and ER with arrows pointing up (as shown in Figure 9.13). He defines (equation 9.82) with B-vilva When using the boundary čondition E" E2",we need to first evaluate just the left side, that is, the parallel component of the full electric field in medium 1, Assume we are in the special case β>1. Which one of the following two expressions for this is correct? The left side of the equations below refers to subscript "1" it's the total (parallel component of) the E field in medium 1. The right sides below are a combination of "T" (incident) and "R" (reflected) terms. A. l B. El 7. Given that we are assuming 8>1, when taking the x component of the above vector equation, which of the following is correct? A. B. Briefly explain your reasoning for the previous two questions. 0 (9.82) These results are strikingly similar to the ones for waves on a string. Indeed, if the permeabilities u are close to their values in vacuum (as, remember, they are for most media), then β = u/u2, and we have

Answer 1

el p plone 2- ot Por Refleclence

- EDT ,U,U) 0 Eo Mole ernbh medium b T

92 β) to