Question

question 18 (2 points) question 18) set the light source to 656 nm. this corresponds to a transition from 2→3. what happens? why? (2pts)

Explanation:

When the light source is set to 656 nm corresponding to a 2→3 transition, an electron in an atom absorbs a photon of energy equal to the energy - difference between the 2nd and 3rd energy levels. This is based on the Bohr model of the atom where electrons can make discrete energy - level transitions by absorbing or emitting photons with energies corresponding to the energy differences between levels.

Answer:

An electron absorbs a photon and makes a transition from the 2nd to the 3rd energy level because the photon's energy matches the energy - difference between the two levels.