Sharanya posted an Question
March 31, 2021 • 22:22 pm 30 points
  • CSIR NET
  • Physical Sciences

78. nd-yag laser is an example of a 4-level laser whereas ruby laser is a 3-level laser. nd-yag lasers have the special feature that (a) they can generate laser

78. Nd-YAG Laser is an example of a 4-level laser whereas Ruby laser is a 3-level laser. Nd-YAG lasers have the special feature that (A) They can generate laser light at different wavelengths since 4 different energy levels are involved (B) The pump power required to achieve population inversion is less than that required for a 3-level laser (C) The pump power required to achieve population inversion is more than that required for a 3-level laser (D) It has two metastable states

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