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Understanding Visible Light and Electromagnetic Radiation
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Understanding Visible Light and Electromagnetic Radiation

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Questions and Answers

What are the primary properties of light?

  • Diffraction, interference, reflection, and absorption
  • Speed, color, temperature, and refraction
  • Electric charge, mass, velocity, and acceleration
  • Intensity, propagation direction, frequency or wavelength spectrum, and polarization (correct)
  • Which source has historically been an important source of light for humans?

  • Fire (correct)
  • The Sun
  • Electric lights
  • Kerosene lamps
  • What is the speed of light in vacuum?

  • 250000000 m/s
  • 299792458 m/s (correct)
  • 350000000 m/s
  • 300000000 m/s
  • What represents the quanta of electromagnetic field?

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

    Which range of wavelengths is usually defined as visible light?

    <p>400–700 nanometres (nm)</p> Signup and view all the answers

    What is the speed of light in vacuum?

    <p>299,792,458 m/s</p> Signup and view all the answers

    Which range of frequencies corresponds to visible light?

    <p>750–420 terahertz</p> Signup and view all the answers

    What are the primary properties of light?

    <p>Intensity, propagation direction, frequency or wavelength spectrum, and polarization</p> Signup and view all the answers

    Which electromagnetic radiation may also be referred to as light in physics?

    <p>Gamma rays</p> Signup and view all the answers

    What is the main source of natural light on Earth?

    <p>The Sun</p> Signup and view all the answers

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