Find the Initial and Final states of an excited Hydrogen Atom

[Mrbilly]

Homework Statement

A hydrogen atom in an excited state absorbs a photon of wavelength 434 nm. What were the initial and final states of the hydrogen atom?

Homework Equations

1/λ=1/91.127 * (1/n_f²-1/n_i²)

The Attempt at a Solution

Tried to use the equation, but keeping the initial and final n's as just 1/n². can find a value for n², but still have two unknowns (initial and final n level) and only the one equation

 

[Spinnor]

See,

http://www.google.com/imgres?um=1&h...&w=512&h=491&ei=kxZ2UIH6DpO30QG52YHwBg&zoom=1

Found via,

https://www.google.com/search?hl=en...urce=og&sa=N&tab=wi&ei=kBZ2UIXpJOeP0QGt0YDwCg