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 (D)</p> Signup and view all the answers

What is the speed of light in vacuum?

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

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

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

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

<p>Wavelength (D)</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 (A)</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 (B)</p> Signup and view all the answers

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

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

How does EMR interact with single atoms and molecules?

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

What does infrared sensing in snakes depend on?

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

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

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

What aspect of EMR determines its behavior?

<p>Wavelength (C)</p> Signup and view all the answers

What process is known as photomorphogenesis?

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

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