1 (6 pontos) Uma onda eletromagnética plana que se propaga no vácuo no sentido positivo do eixo
x tem componentes do campo elétrico
E_{x}=E_{z}=0 e:
E_{y}(x, t)=(3,05 \mathrm{~V} / \mathrm{m}) \cos \left[k x-\left(8,89 \times 10^{15} \mathrm{rad} / \mathrm{s}\right) t\right]
(a) Qual é o comprimento de onda da onda? Considere a velocidade da luz como
3 \times 10^{\mathrm{s}} \mathrm{m} / \mathrm{s} . (b) Qual é a amplitude do campo magnético associado à onda? Escreva a equação para o campo magnético da onda. (c) Calcule o valor máximo da taxa de fluxo de energia por unidade de área para a onda eletromagnética.
(a)
(A)
2,55 \times 10^{-6} \mathrm{~m} , (B)
8,89 \times 10^{-6} \mathrm{~m} , (C)
3,46 \times 10^{-7} \mathrm{~m} , (D)
9,62 \times 10^{-6} \mathrm{~m} , (E)
3,21 \times 10^{-7} \mathrm{~m} , (F)
2,41 \times 10^{-7} \mathrm{~m} , (G)
4,09 \times 10^{-7} \mathrm{~m} , (H)
2,89 \times 10^{-7} \mathrm{~m} , (I)
1,08 \times 10^{-5} \mathrm{~m} , (J)
4,74 \times 10^{-7} \mathrm{~m} , (K)
2,69 \times 10^{-7} \mathrm{~m} , (L)
8,57 \times 10^{-7} \mathrm{~m} , (M)
2,12 \times 10^{-7} \mathrm{~m},(\mathrm{~N}) 6,20 \times 10^{-7} \mathrm{~m} , (O)
5,64 \times 10^{-7} \mathrm{~m} , §
3,67 \times 10^{-7} \mathrm{~m} ,
(b) (A)
4,07 \times 10^{-9} \mathrm{~T} , (B)
1,97 \times 10^{-8} \mathrm{~T} , (C)
7,63 \times 10^{-9} \mathrm{~T} , (D)
5,20 \times 10^{-9} \mathrm{~T} , (E)
1,36 \times 10^{-8} \mathrm{~T} , (F)
1,48 \times 10^{-8} \mathrm{~T} , (G)
1,14 \times 10^{-8} \mathrm{~T} , (H)
5,70 \times 10^{-9} \mathrm{~T} , (I)
9,07 \times 10^{-9} \mathrm{~T} , (J)
1,02 \times 10^{-8} \mathrm{~T} , (K)
1,61 \times 10^{-8} \mathrm{~T} , (L)
4,57 \times 10^{-9} \mathrm{~T} , (M)
8,23 \times 10^{-9} \mathrm{~T},(\mathrm{~N}) 6,47 \times 10^{-9} \mathrm{~T} , (O)
1,22 \times 10^{-} \mathrm{~T} , §
1,80 \times 10^{-8} \mathrm{~T} ,
(c)
(A)
5,47 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (B)
4,40 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (C)
9,27 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (D)
6,48 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (E)
2,47 \times
10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (F)
5,35 \times 10^{-3} \mathrm{~W} / \mathrm{m}^{2} , (G)
1,09 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (H)
5,94 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (I)
4,95 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (J)
1,99 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2},(\mathrm{~K}) 4,70 \times 10^{-1} \mathrm{~W} / \mathrm{m}^{2},(\mathrm{~L}) 5,66 \times 10^{-3} \mathrm{~W} / \mathrm{m}^{2},(\mathrm{~M}) 3,60 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2},(\mathrm{~N}) 4,04 \times
10^{-2} \mathrm{~W} / \mathrm{m}^{2} , (O)
8,33 \times 10^{-2} \mathrm{~W} / \mathrm{m}^{2} , §
7,23 \times 10^{-3} \mathrm{~W} / \mathrm{m}^{2}