In a helium-neon laser the emissions occur from transitions between two excited states in neon, one being at 20.66 eV above the ground state and the other being 18.70 eV above ground. What is the energy of the photons emitted by this laser?
A)20.66 eV
B)1.96 eV
C)18.70 eV
D)19.60 eV
E)39.36 eV

Question

Quizplus · Accepted Answer

The energy of the emitted photons is the difference between the two excited states: 20.66 eV - 18.70 eV = 1.96 eV.

In a Helium-Neon Laser the Emissions Occur from Transitions Between