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  • Question
  • The first step to getting output from a laser is to excite an active medium. What is this process called?


  • Options
  • A. Pumping
  • B. Exciting
  • C. Priming
  • D. Raising

  • Correct Answer
  • Pumping 

    Explanation
    A collection of atoms or molecules that can be excited to a higher energy state is called an active medium. Before lasing can occur, the active media is "pumped". The process of raising the atoms in the active media from a lower energy state to a higher state is like pumping water up from a well.

  • More questions

    • 1. First Olympic Games were held in

    • Options
    • A. 876 BC
    • B. 798 BC
    • C. 776 BC
    • D. 898 BC
    • Discuss
    • 2. The minimum age required to become the prime minister of India is


    • Options
    • A. 25 years
    • B. 30 years
    • C. 40 years
    • D. 35 years
    • Discuss
    • 3. India reached the final of the Davis Cup for the first time in...?

    • Options
    • A. 1964
    • B. 1966
    • C. 1970
    • D. 1974
    • Discuss
    • 4. Which of the following is tropical grassland?


    • Options
    • A. Taiga
    • B. Savannah
    • C. Pampas
    • D. Prairies
    • Discuss
    • 5. Indian Cancer Research institute is located at

    • Options
    • A. New Delhi
    • B. Calcutta
    • C. Chennai
    • D. Mumbai
    • Discuss
    • 6. The ratio of land to ocean in the southern hemisphere is

    • Options
    • A. 1 to 1.5
    • B. 1 to 1
    • C. 1 to 4
    • D. 1 to 10
    • Discuss
    • 7. How many players are there in Water Polo team?

    • Options
    • A. 4
    • B. 5
    • C. 6
    • D. 7
    • Discuss
    • 8. Gangubai hangal is the name associated with

    • Options
    • A. Literature
    • B. Music
    • C. Journalism
    • D. Environment
    • Discuss
    • 9. The largest production of mica in Asia is from


    • Options
    • A. Indonesia
    • B. Malaysia
    • C. Myanmar
    • D. India
    • Discuss
    • 10. Plants synthesis protein from

    • Options
    • A. starch
    • B. sugar
    • C. amino acids
    • D. fatty acids
    • Discuss


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