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Which type of waves require some sort of material in which to travel or propagate?
Which of the following is an example of an electromagnetic wave?
Which of the following is a type of Mechanical Wave?
What type of mechanical waves cause the medium through which they travel to be displaced back and forth along the path of the wave?
What type of mechanical waves cause a medium to be displaced perpendicular to the direction of travel of the wave?
An electronic circuit especially designed to generate electromagnetic waves is called what?
One complete sequence of values of strength of an electromagnetic wave as it passes through a point is space is known as what?
The length of an electromagnetic wave's cycle is known as what?
The strength of an electromagnetic wave at particular points along the wave is known as what?
The number of cycles of an electromagnetic wave repeated during one second of time is known as what?
The period is the time required to complete one cycle of an electromagnetic wave is known as what?
Electromagnetic waves tend to bend as they reach the higher portions of our atmosphere and increase the distances over which they can be received. What is this effect called?
When temperature inversions trap cold air closer to the Earth, conditions can be right for the reflection of radio signals and can cause a significant increase in the distances they can travel. What is this called?
Electromagnetic waves transmitted in the range from about 5 kHz to 30 GHz are commonly called what?
Which form of carrier wave modulation varies the amplitude of the signal to convey information?
The audio portion of broadcasts from TV stations use what type of carrier wave modulation?
Most types of radars use what type of carrier wave modulation technique?
Which of the following would be a type of special radar?
Which of the following abbreviations refers to a common type of radar scope?
Where does the Commanding Officer of a ship generally go during combat operations?
What is the current term given to all measures used by our forces to use the electronic spectrum despite the enemy's attempts to prevent us from doing so?