36.16 • Uma luz monocromática de comprimento de onda de 592 nm, vinda de uma fonte distante, passa por uma fenda com 0,0290 mm de largura. Na figur...

Para resolver esse problema, podemos utilizar a equação da intensidade de difração de uma fenda simples: I = (P/4πr²)² (λ/α)² sin²(α/2) Onde: - I é a intensidade da luz difratada; - P é a potência da fonte de luz; - r é a distância entre a fenda e a tela; - λ é o comprimento de onda da luz; - α é o ângulo de desvio em relação ao eixo central da fenda. No centro do máximo central, temos α = 0, portanto: I0 = (P/4πr²)² (λ/α)² sin²(α/2) 4,00 x 10^-5 = (P/4πr²)² (592 x 10^-9/0,0290 x 10^-3)² sin²(0/2) 4,00 x 10^-5 = (P/4πr²)² (0,592/0,0290)² x 1 P/4πr² = √(4,00 x 10^-5 / (0,592/0,0290)²) P/4πr² = 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