Technology Interactions © 2007

Chapter 15: Lasers and Lights

Self-Check Quiz

1.
Visible light and X rays are both forms of
A)matter.
B)sound waves.
C)electromagnetic waves.
D)seismic energy.
2.
The color of visible light having the longest wavelength is
A)red.
B)blue.
C)violet.
D)yellow.
3.
What are the extremely tiny charged particles in light?
A)protons
B)isotopes
C)neutrons
D)photons
4.
Which is the best description of the way in which light travels?
A)irregular pulses
B)wave motion
C)regular short-long pulses
D)undifferentiated stream
5.
Which light source uses a glowing filament?
A)LED
B)incandescent lamp
C)fluorescent lamp
D)neon tube
6.
Which laser component receives energy, transforms it to light, and amplifies the light?
A)excitation mechanism
B)active medium
C)feedback mechanism
D)metamorphic mechanism
7.
Which is not a component of a laser?
A)feedback mechanism
B)excitation mechanism
C)cathode ray tube
D)active medium
8.
Which description does not apply to coherent light?
A)All the light waves have the same wavelength.
B)The waves with the shortest wavelength travel fastest.
C)All the wave peaks and valleys are aligned.
D)The light waves are in phase.
9.
White light consists of
A)light of a long wavelength.
B)waveless light.
C)light of a short wavelength.
D)light of many different wavelengths.
10.
The power of a laser is expressed in
A)watts.
B)joules.
C)kilograms.
D)amps.
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