Understanding Visible Light and Electromagnetic Radiation
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Questions and Answers

What is the primary source of natural light on Earth?

  • The Sun (correct)
  • X-rays
  • Gamma rays
  • Microwaves

    • What is the range of wavelengths for visible light?

  • 600–800 nm
  • 300–600 nm
  • 400–700 nm (correct)
  • 200–500 nm

    • Which electromagnetic radiation represents the quanta of the electromagnetic field?

  • Gamma rays
  • Microwaves
  • X-rays
  • Photons (correct)

    • In which area of physics is the study of light known as an important research area?

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

    What is the speed of light in vacuum?

    <p>$299792458 m/s$</p> Signup and view all the answers

    Which type of radiation can be analyzed as both waves and particles?

    <p>Visible light</p> Signup and view all the answers

    What is the classification of electromagnetic radiation (EMR) based on?

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

    Why does EMR in the visible light spectrum become invisible to humans at the lower end?

    <p>Its photons no longer have enough individual energy</p> Signup and view all the answers

    Why are humans unable to detect ultraviolet light below 360 nm?

    <p>The rods and cones in the retina are damaged</p> Signup and view all the answers

    What is the speed of light in vacuum in SI units?

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

    How does EMR interact with single atoms and molecules?

    <p>By changing the conformation of atoms</p> Signup and view all the answers

    What does infrared sensing in snakes depend on?

    <p>Natural thermal imaging</p> Signup and view all the answers

    How do animals such as insects and shrimp detect ultraviolet light?

    <p>Through quantum photon-absorption mechanisms</p> Signup and view all the answers

    What causes changes in the bonding or chemistry of a molecule when interacting with EMR?

    <p>Electronic excitation within molecules</p> Signup and view all the answers

    What aspect of EMR determines its behavior?

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

    What process is known as photomorphogenesis?

    <p>Plant growth affected by light spectrum</p> Signup and view all the answers

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