8.
In a Ruby laser, population inversion is achieved by applying :
(A) magnetic field
(B) electronic field
(C) both magnetic and electric fields (D) optical pumping
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Correct option: (D) optical pumping
In a Ruby laser, population inversion is achieved by applying optical pumping.
Explanation:
- Ruby laser, as the name suggests, uses a ruby in it. It was first used in rangefinding.
- Ruby laser was the first laser to be functional. It was made by Theodore Harold "Ted" Maiman, the renowned American engineer and physicist in 1960.
- The light that is produced in this laser, has an wavelength of 694.3 nanometer.
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