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Questions and Answers
Which of the following is NOT a type of radio wave propagation mode?
Which of the following is NOT a type of radio wave propagation mode?
- Sky waves
- Infrared waves (correct)
- Space waves
- Ground waves
What is the primary factor that affects the propagation of radio waves in the atmosphere?
What is the primary factor that affects the propagation of radio waves in the atmosphere?
- Temperature
- Atmospheric pressure
- Ionization of the atmosphere (correct)
- Humidity
Which of the following is NOT a characteristic of line-of-sight (LOS) radio communication?
Which of the following is NOT a characteristic of line-of-sight (LOS) radio communication?
- It relies on sky wave propagation for long-distance communication. (correct)
- It is used for short-range communications, such as in cellular networks.
- The signal strength decreases with distance due to free-space path loss.
- The transmitting and receiving antennas must have a clear, unobstructed path between them.
What is the primary mechanism that causes fading in radio wave propagation?
What is the primary mechanism that causes fading in radio wave propagation?
Which of the following is a widely used radio wave propagation model for predicting signal strength in urban environments?
Which of the following is a widely used radio wave propagation model for predicting signal strength in urban environments?
What is the primary reason for the attenuation of radio waves as they propagate through the atmosphere?
What is the primary reason for the attenuation of radio waves as they propagate through the atmosphere?
What is the primary factor that limits the range of direct wave signals in terrestrial propagation?
What is the primary factor that limits the range of direct wave signals in terrestrial propagation?
Which of the following statements about the radio horizon is correct?
Which of the following statements about the radio horizon is correct?
Which of the following equations is used to calculate the maximum distance between the transmitter and receiver over average terrain?
Which of the following equations is used to calculate the maximum distance between the transmitter and receiver over average terrain?
What type of radio wave propagation is being discussed in the given text?
What type of radio wave propagation is being discussed in the given text?
Which of the following statements about ground-reflected waves is true?
Which of the following statements about ground-reflected waves is true?
What is the primary factor that determines the radio horizon distance?
What is the primary factor that determines the radio horizon distance?
What is the primary cause of severe absorption of microwave frequencies in the Earth's atmosphere?
What is the primary cause of severe absorption of microwave frequencies in the Earth's atmosphere?
What is the relationship between the velocity of propagation of an electromagnetic wave and the density of the medium it is propagating through?
What is the relationship between the velocity of propagation of an electromagnetic wave and the density of the medium it is propagating through?
How is the refractive index of a medium mathematically defined?
How is the refractive index of a medium mathematically defined?
What is the key factor that determines the amount of bending or refraction that occurs when an electromagnetic wave passes from one medium to another?
What is the key factor that determines the amount of bending or refraction that occurs when an electromagnetic wave passes from one medium to another?
Which of the following is NOT one of the optical effects mentioned in the passage that can alter the ray-wavefront propagation of electromagnetic waves in the Earth's atmosphere?
Which of the following is NOT one of the optical effects mentioned in the passage that can alter the ray-wavefront propagation of electromagnetic waves in the Earth's atmosphere?
Which of the following statements best describes the relationship between electromagnetic refraction and the bending of the radiowave path?
Which of the following statements best describes the relationship between electromagnetic refraction and the bending of the radiowave path?
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