Laser light is generated by energizing Helium-Neon gas in chamber. The ground and metastable states of Helium are $0\text{eV}$ and $20.61\text{eV}$ respectively. The ground, higher and metastable energies of Neon are $0\text{eV}$, $18.70\text{eV}$ and $20.66\text{eV}$ respectively. The values of speed of light, Planck constant and charge of electron are $3\times {10}^8\text{m/s}$, $6.625\times {10}^{-34}\text{Js}$ and $1.6\times {10}^{-19}C$ respectively.
In this process, helium molecules