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  • Question
  • After the first photons of light are produced, which process is responsible for amplification of the light?


  • Options
  • A. Blackbody radiation
  • B. Stimulated emission
  • C. Planck's radiation
  • D. Einstein oscillation

  • Correct Answer
  • Stimulated emission 

    Explanation
    The word "laser" is actually an acronym for light amplification by stimulated emission of radiation. Atoms or molecules of the active medium that have been excited to a higher energy level are stimulated by a passing photon to relax to a lower energy level and emit a photon that is indistinguishable from the passing photon, thereby increasing the number of photons like the incident one.

  • More questions

    • 1. What molecule makes the trunk of a tree sturdy?

    • Options
    • A. Disaccharide
    • B. Fructose
    • C. Cellulose
    • D. Glucose
    • Discuss
    • 2. Most of the oxygen transported by the blood is

    • Options
    • A. bound to hemoglobin
    • B. dissolved in plasma
    • C. dissolved in water
    • D. in ionic form as solute in plasma
    • Discuss
    • 3. Who is the author of the book named "Making India Awesome"?

    • Options
    • A. Jairam Ramesh
    • B. Tarun Khanna
    • C. Chetan Bhagat
    • D. Amitav Ghosh
    • Discuss
    • 4. Choose the most appropriate answer:Lines joining places of equal temperature are called

    • Options
    • A. Isotherms
    • B. Isohyets
    • C. Isomers
    • D. Isobars
    • Discuss
    • 5. Elapidae Naja is the scientific name of _______.

    • Options
    • A. Cobra
    • B. Elephant
    • C. Eagle
    • D. Owl
    • Discuss
    • 6. What is the currency of Japan?

    • Options
    • A. yen
    • B. dirham
    • C. yuan
    • D. None of the above
    • Discuss
    • 7. Benign prostatic hyperplasia is characterized by

    • Options
    • A. Not functioning of prostate gland
    • B. Enlargement of prostate gland
    • C. Epididymis issue
    • D. None of the above
    • Discuss
    • 8. The book "Azad Bachpan ki Aur" is written by which author?

    • Options
    • A. Kailash Satyarthi
    • B. Radhakant Bharti
    • C. Dipak Misra
    • D. Subhash Chandra
    • Discuss
    • 9. Where is the DNA located in a eukaryotic cell?

    • Options
    • A. Nucleus
    • B. Chromosomes
    • C. Mitochondria
    • D. All of the above
    • Discuss
    • 10. Junk e-mail is also called ______

    • Options
    • A. Spam
    • B. Spoof
    • C. Sniffer script
    • D. Spool
    • Discuss


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