The energy (in joules) of an electron energy level in the Bohr atom is given by the expression: [tex]E_{n}[/tex]= -2.179 x [tex]10^-18/n^2 J[/tex]where n is the principal quantum number for the energy level. What is the frequency in Hz of the electromagnetic radiation absorbed when an electron is raised up from level with n = 4 to that with n = 9?(adsbygoogle = window.adsbygoogle || []).push({});

I'm unsure of the the formula to use, or even the first step. Any ideas??

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Electromagnetic Radiation

**Physics Forums | Science Articles, Homework Help, Discussion**