In He-Ne laser the lasing action is produced by_______________?
Correct answer: A. Ne only
- A. Ne only
- B. He-Ne both
- C. Electrons of He
- D. Electrons Ne
Explanation
In a helium-neon laser, excited helium atoms transfer energy to neon atoms, but the actual laser transitions and emitted photons come from neon atoms. The likely mistake is choosing He-Ne both because helium is essential for energy transfer, although neon alone performs the lasing transition.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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