Consider an electron in an infinite well of width 1.2 nm. What is the wavelength of a photon emitted when the electron in the infinite well makes a transition from the first excited state to the ground state? The value of ¯h is 1.05457 × 10^-34 J · s , the Bohr radius is 5.29177 × 10-11 m, the Rydberg constant for hydrogen is 1.09735 × 10^7 m-1 , the ground state energy for hydrogen is 13.6057 eV, and the speed of light is 2.99792 × 10^8 m/s . 1 eV = 1.60218 × 10^-19 eV.