Textbook assignment: Chapter 1, Wave Propagation, pages 1-1 through 1-48.
1-1. What is the major advantage of the
telegraph over earlier methods of
1-2. The spreading out of radio waves is
referred to as propagation and is used in
which of the following Navy equipment?
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
2. Because radio-frequency waves are
below the sensitivity range of the
3. Because the human eye detects only
4. Because radio-frequency waves are
above the sensitivity range of the
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
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?
1-7. 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?
1-8. Which of the following terms is used for
the vehicle through which a wave travels
from point to point?
1-9. Which of the following is NOT an
element necessary to propagate sound?