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Can someone help me solve problem A15? I've been stuck on it for about 20 minutes. I tried using the equation deltaE=-hR(1/finialn^2---1/initialn^2). Then it didn't work so I used v=R(1/finialn^2---1/initialn^2) thats shown in the book. I understand n initial is 1 because Lyman but when I work the problems out I can't seem to get the correct answer. Using the books equation I get 2.914x10^15=(3.29x10^15)(1/finialn^2----1). After this I can't get the answer as n final equals 3.
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