Neco Model Questions Vol1 2019 Physics Question 25
Practice objective / multiple choice question 25 from the 2019 Neco Model Questions Vol1 Physics examination.
In a hydrogen atom an electron drops from an unknown higher energy level \(n_i\) to the \(n=2\) level, emitting a photon with wavelength \(410\ \text{nm}\). (a) Determine the initial principal quantum number \(n_i\). (b) Calculate the energy of the emitted photon in electron volts (eV). (Use \(R = 1.097\times10^{7}\ \text{m}^{-1}\), \(h = 6.626\times10^{-34}\ \text{J s}\), \(c = 3.00\times10^{8}\ \text{m s}^{-1}\), and \(1\ \text{eV}=1.602\times10^{-19}\ \text{J}\).)
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This is Neco Model Questions Vol1 2019 Physics Question 25. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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