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mss90

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## Homework Statement

A wavelenght of 410.2*10^-9m is emitted by the hydrogen atom in a high voltage discharge tube. what are the initial and final values of the quantum number n for the energy lvl transition that produces this wavelength?

## Homework Equations

1/(lambda) = R * (1/2^2 - 1/n^2): Lyman series?

## The Attempt at a Solution

I have used this equation to figure out (lambda) but never the other way around.

I tried to solve for n but it doesn't make sense. How can I know which series to solve n for?

At first I thought that it had to be Lyman as Z=1 for hydrogen and subsequently n=1 but no.

The answer is ni = 6 and nf = 2.