LASERS Session 1 Spontaneous Emission Stimulated Emission Light Amplification noise reduced

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LASERS Session 1 (Spontaneous Emission, Stimulated Emission, Light Amplification) • *What does LASER stand for? In what respect it differ from an ordinary source of light? • *How LASERs are different compared to X-rays? • *Differentiate between spontaneous emission and stimulated emission of radiation. • *Define absorption. What is its role in a laser system? • *What is population inversion? Explain its significance in the operation of LASER. • *What is pumping in laser? Mention the types of pumping methods. • *Differentiate between stimulated emission and spontaneous emission. • *What is the role of resonant cavity in the operation of laser? • *Define – absorption, spontaneous emission, stimulated emission, metastable state, population inversion • Notes on this topic are available here : https://drive.google.com/file/d/1AHQQ...

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