Worksheet: The Properties of Laser Light

In this worksheet, we will practice describing the properties of laser light and using technical terms to refer to these properties.

Q1:

The diagram represents the resultant waveform of the waves emitted from an incandescent light source. Which of the following diagrams most correctly represents a group of the waves emitted from the incandescent light source?

  • AII
  • BI

Q2:

The diagrams represent groups of light waves from a laser light source and from an incandescent light source.

Which of the groups of light waves is from the laser light source?

  • AII
  • BI

Which group of light waves is more coherent?

  • AII
  • BI

Q3:

The diagram represents a group of light waves from a laser light source. Which of the following diagrams most correctly represents the resultant waveform of the photons?

  • A
  • B

Q4:

The diagram represents the resultant waveform of the waves emitted from a laser light source. Which of the following diagrams most correctly represents a group of the waves emitted from the laser light source?

  • AI
  • BII

Q5:

The diagram represents the beam emitted by a green laser light source. The beam is viewed perpendicularly to its length. Which of the following most correctly explains why the green beam appears to consist of many point-like particles?

  • AThe point-like particles seen are individual electrons ionized from the air by the laser beam.
  • BMost of the light emitted travels parallel to the beam and only a few rays are scattered enough to travel perpendicularly to the direction of the beam.
  • CThe point-like particles seen are individual photons in the beam, and the beam has such low intensity that there is significant space between individual photons.
  • DThe beam produces a longitudinal wave.
  • EThe beam produces an interference pattern of light and dark regions.

Q6:

The diagram represents the beams emitted by a red-laser-light source and an incandescent white-light source.

Which light source produces a more collimated beam?

  • ABoth sources produce equally collimated beams.
  • BThe incandescent white-light source
  • CThe red-laser-light source

For the red-laser-light source, how does the radiant intensity 𝐼 at the emitting surface of the beam compare to the radiant intensity 𝐼 of the beam at a distance 𝑑 from the emitting surface?

  • A𝐼=𝐼
  • B𝐼<𝐼
  • C𝐼>𝐼

For the incandescent white-light source, how does the radiant intensity 𝐼 at the emitting surface of the beam compare to the radiant intensity 𝐼of the beam at a distance 𝑑 from the emitting surface?

  • A𝐼=𝐼
  • B𝐼<𝐼
  • C𝐼>𝐼

For the red-laser-light source, how does the radiant intensity 𝐼 of the beam at a distance 𝑑 from the emitting surface compare to the radiant intensity 𝐼 of the beam at a distance 𝑑 from the emitting surface?

  • A𝐼=𝐼
  • B𝐼<𝐼
  • C𝐼>𝐼

For the incandescent white-light source, how does the radiant intensity 𝐼 of the beam at a distance 𝑑 from the emitting surface compare to the radiant intensity 𝐼 of the beam at a distance 𝑑 from the emitting surface?

  • A𝐼=𝐼
  • B𝐼<𝐼
  • C𝐼>𝐼

Q7:

The graph shows how the output intensity of two light sources varies with the wavelength of the light that they emit. Both light sources emit most strongly at one peak wavelength, with output decreasing as wavelength varies from the peak wavelength.

Which color curve represents the light emitted by an incoherent light source?

  • AThe red curve
  • BThe blue curve

Which color curve represents a more monochromatic light source?

  • AThe red curve
  • BThe blue curve

Q8:

The diagrams represent the beams emitted by an incandescent white-light source, a red-laser-light source, and a green-laser-light source. Each light source has the same intensity at its emitting surface. The beams are viewed perpendicularly to their lengths.

Which light source produces the most scattered beam?

  • AThe incandescent white-light source
  • BThe red-laser-light source
  • CThe green-laser-light source

Which light source produces the least scattered beam?

  • AThe green-laser-light source
  • BThe red-laser-light source
  • CThe incandescent white-light source

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.