5. Given figure shows parts of energy level diagrams of Helium and Neon atoms. An electrical discharge excites the Helium atom from its ground state to its excited state of 20.61 eV. The excited Helium atom collides with the Neon atom in its ground state and excites this atom to the state at 20.66 eV. Lasing action takes place for electron transitions from E3* to E2 in the Ne atom. From given data in figure, show that the wavelength of the red He-Ne laser light is approximately 633 nm. 20.61 eV 20.66 eV Lasing 18.70 eV Collision Ground state Ground state He Ne ENERGY E₁

5. Given figure shows parts of energy level diagrams of Helium and Neon atoms. An electrical discharge excites the Helium atom from its ground state to its excited state of 20.61 eV. The excited Helium atom collides with the Neon atom in its ground state and excites this atom to the state at 20.66 eV. Lasing action takes place for electron transitions from E3* to E2 in the Ne atom. From given data in figure, show that the wavelength of the red He-Ne laser light is approximately 633 nm. 20.61 eV 20.66 eV Lasing 18.70 eV Collision Ground state Ground state He Ne ENERGY E₁