Electromagnetic Wave

__ travel through the air from a transmitter to a receiver.

• Sound waves

• Infrared radiation

• Electromagnetic waves (RF waves)

• Visible light

The earth’s atmosphere is made up of distinct layers separated by height. Only two of these layers play a role in radio communications. What are they?

• Ozone Layer/ Stratosphere

• Troposphere/ Ionosphere

• Mesosphere/ Exosphere

• Thermosphere/ Stratopause

Optimum frequency for sky wave propagation is determined by all except?

• Time of Day

• Sun's Radiation

• Location

• Temperature Danger Zone

What enables point to point communications?

• Radio waves travel in a straight line

• lower frequencies reflect and refract in the ionosphere

• Signals are transmitted through the air

• Electromagnetic waves are used to transmit data

What layer allows for BLOS and high data rate communications

• Stratosphere

• Mesosphere

• Thermosphere

• Troposphere

What layer in the ionosphere has 2 sub layers?

• F Layer

• D Layer

• E Layer

• P Layer

Which layer has the most signal absorption?

• F Layer

• E Layer

• C Layer

• D Layer

The ionosphere is the part of the atmosphere where most of the __ takes place.

• Photosynthesis

• Molecular Ionization

• Ozone Formation

• Atmospheric Pressure

The ionosphere contains three layers called the..

• D,E & F Layer

• Troposphere, Stratosphere, Mesosphere

• A, B & C Layer

• Thermosphere, Exosphere, Magnetosphere

What is Sporadic-E?

• A formation of super dense ionization pockets with-in the layer

• A type of atmospheric phenomenon

• A type of radio wave propagation

• A type of cloud formation