Question

Waves of the Ultra High Frequency (UHF) range normally propagate by means of
1. Ground waves
2. Sky waves
3. Space waves
4. Surface waves

Answer 1

Correct Answer - Option 3 : Space waves

The correct answer is Space waves.

• Ultra-High Frequency (UHF) range normally propagate by means of Space waves.

 

• Ground Waves
  • Ground waves are mainly used for transmission between the surface of the earth and the ionosphere.
  • These are made up of the number of constituent waves.
  • Low frequencies of the electromagnetic spectrum were used.
  • The collection of these radiations along the surface of the earth is known as ground wave propagation.
• SkyWave
  • In radio communication, skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere.
• Space Wave
  • Space wave propagation is defined as the radio waves that occur within the 20km of the atmosphere ie; troposphere, comprising a direct and reflected waves.
  • These waves are also known as tropospheric propagation as they can travel directly from the earth's surface to the troposphere surface of the earth.
• Surface Wave
  • In physics, a surface wave is a mechanical wave that propagates along with the interface between differing media.
  • A common example is gravity waves along the surface of liquids, such as ocean waves.