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Questions and Answers

In laser systems, what is the result of stimulated emission when a photon of energy stimulates an electron to transfer between states?

  • Creation of Energy State Transition
  • Production of Two Photons in Phase (correct)
  • Generation of Spontaneous Emission
  • Formation of Population Inversion
  • Which phenomenon involves forcing or stimulating an electron to transfer between different energy states?

  • Energy State Transition
  • Electron State Transition
  • Population Inversion
  • Stimulated Emission (correct)
  • What is the term for the condition where more atoms or molecules are in a higher energy state than in a lower energy state?

  • Population Inversion (correct)
  • Spontaneous Emission
  • Stimulated Emission
  • Energy State Transition
  • What is the term used to describe the power emitted from a unit area per solid angle?

    <p>Irradiance</p> Signup and view all the answers

    Which characteristic of lasers makes their irradiance far greater than other sources?

    <p>Directionality and Compactness</p> Signup and view all the answers

    What does Population Inversion refer to in lasers?

    <p>Higher population in the excited state than the ground state</p> Signup and view all the answers

    Which process involves the emission of a photon by a stimulated atom or molecule?

    <p>Stimulated Emission</p> Signup and view all the answers

    In laser systems, what term is used to describe the transition of an electron from a higher energy state to a lower energy state?

    <p>De-Excitation</p> Signup and view all the answers

    What term describes the power emitted from a laser per unit area?

    <p>Irradiance</p> Signup and view all the answers

    What technique is used to concentrate the energy into a pulse?

    <p>Q-switch</p> Signup and view all the answers

    Which technique shortens the width of the pulse in time?

    <p>Mode-locking</p> Signup and view all the answers

    What is the formula for calculating the average power of a pulsed laser?

    <p>E{pulse} * R{reprate}</p> Signup and view all the answers

    What is the unit of peak power of a pulsed laser?

    <p>Gigawatt</p> Signup and view all the answers

    How is monochromaticity measured in a light source?

    <p>By specifying the linewidth of the radiation</p> Signup and view all the answers

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