Q. The scientific principle involved in a laser is

  • (A) Faraday's laws of induction
  • (B) Motion of a charges particle in an electromagnetic field
  • (C) Newton's laws of motion
  • (D) Amplification by population inversion
βœ… Correct Answer: (D) Amplification by population inversion

Published by Praveen Singh ⭐ 36.81K Points at 25-Dec-2021 07:53 am in Physics

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