In a Helium-Neon laser, population inversion of _ atoms is achieved which emits radiations, when they are stimulated to fall at a lower level.
Correct answer: C. Helium and Neon
- A. Neon
- B. Helium
- C. Helium and Neon
- D. Chromium
Explanation
In a Helium-Neon laser, population inversion of C. Helium and Neon atoms is achieved which emit radiations, when they are stimulated to fall to a lower energy level.
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Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.
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