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ASSIGNMENT 1
Textbook assignment: Chapter 1, “Wave Propagation,” pages 1-1 through 1-48.
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1-1. What is the major advantage of the
telegraph over earlier methods of
communication?
1. Range
2. Speed
3. Security
4. Reliability
1-2. The spreading out of radio waves is
referred to as propagation and is used in
which of the following Navy equipment?
1. Detection
2. Communication
3. Radar and navigation
4. Each of the above
1-3. Radio-frequency waves CANNOT be
seen for which of the following reasons?
1. Because radio-frequency energy is
low powered
2. Because radio-frequency waves are
below the sensitivity range of the
human eye
3. Because the human eye detects only
magnetic energy
4. Because radio-frequency waves are
above the sensitivity range of the
human eye
1-4. Radio waves travel at what speed?
1. Speed of sound
2. Speed of light
3. Speed of the Earth's rotation
4. Speed of the Earth's orbit around the
sun
1-5. Which of the following types of energy
CANNOT be seen, heard, or felt?
1. Radio waves
2. Sound waves
3. Heat waves
4. Light waves
1-6. A stone dropped into water creates a
series of expanding circles on the surface
of the water. This is an example of which
of the following types of wave motion?
1. Transverse
2. Concentric
3. Longitudinal
4. Compression
1-7. A sound wave that moves back and forth
in the direction of propagation is an
example of which of the following types
of wave motion?
1. Composite
2. Concentric
3. Transverse
4. Longitudinal
1-8. Which of the following terms is used for
the vehicle through which a wave travels
from point to point?
1. Medium
2. Source
3. Detector
4. Receiver
1-9. Which of the following is NOT an
element necessary to propagate sound?
1. Medium
2. Source
3. Detector
4. Reference
