He-Ne Lasers
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Questions and Answers

Which type of laser is commonly used in supermarkets to read bar codes?

  • Yellow laser
  • Red laser (correct)
  • Green laser
  • Blue laser
  • Which field of study utilizes He-Ne lasers to produce 3D images of objects?

  • Holography (correct)
  • Physics
  • Biology
  • Chemistry
  • Surveyors take advantage of which characteristic of the helium-neon laser to take precise measurements over long distances?

  • Low beam quality
  • Good beam quality (correct)
  • Short wavelength
  • High power output
  • Which type of laser is found to emit light that is more directional and more monochromatic?

    <p>Gas lasers</p> Signup and view all the answers

    Which effects are present in solid-state lasers that can affect their performance?

    <p>Crystalline imperfection, thermal distortion, and scattering</p> Signup and view all the answers

    Which type of laser is capable of operating continuously without the need for cooling?

    <p>Gas lasers</p> Signup and view all the answers

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