Q. What are three types of lasers?

  • (A) Gas, metal vapour, rock
  • (B) Diode, inverted, pointer
  • (C) Pointer, diode, CD
  • (D) Gas, solid state, diode
✅ Correct Answer: (D) Gas, solid state, diode

Published by Ram Sharma ⭐ 193.88K Points at 12-Jan-2022 04:04 pm in Physics

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