What is dispersive propagation?
Water waves, in this context, are waves propagating on the water surface, with gravity and surface tension as the restoring forces. As a result, water with a free surface is generally considered to be a dispersive medium.
What is the medium of wave propagation?
Examples of materials that are used to produce or serve as propagation media are (a) metals for electric current signals, (b) glass and other dielectric materials for lightwave signals, and (c) air for sound wave signals, with the exception that a vacuum or free space is considered as a propagation medium for …
What are the different types of wave propagation?
Hint: There are three types of modes of propagation of electromagnetic waves: Ground wave propagation, Space wave propagation and Skywave propagation. Electromagnetic waves in the frequency range of a few Hz to about 1011Hz are generally called radio waves.
What are the three modes of propagation of electromagnetic waves?
Radio transmission waves are divided in three types, medium wave, short wave and ultra short wave.
What is frequency dispersive propagation?
Frequency dispersion results from different frequencies propagating at different speeds. Frequency dispersion is generally observable on seismic waves that propagate along the earth’s surface but frequency dispersion is hardly ever perceptible on internally reflected waves.
What is dispersive medium in physics?
A dispersive medium is a medium in which waves of different frequencies travel at different velocities. With electromagnetic radiation (e.g. light, radio waves), dispersion corresponds to a frequency-dependent variation in the index of refraction of the medium.
What is the role of the medium in the propagation of waves?
Mechanical waves require a medium in which they propagate. Without the wave the medium is in equilibrium (e.g. a string under tension). In the medium is disturbed away from equilibrium this costs energy. Such a disturbance will propagate in the medium in the form of waves.
Which examples describe wave propagation through a medium?
Water waves and sound waves are examples of mechanical waves — waves that propagate through a material medium.
What are the two main forms of wave propagation?
Waves come in two kinds, longitudinal and transverse. Transverse waves are like those on water, with the surface going up and down, and longitudinal waves are like of those of sound, consisting of alternating compressions and rarefactions in a medium.
What is the two types of space wave propagation?
Space Wave Propagation Depends on Three Components: Direct Waves: The radio waves that, when transmitted from the transmitting antenna, reach the receiving antenna directly. Ground Reflected Waves: The radio waves that reach the receiving antenna after reflection from the ground.
How do electromagnetic waves propagate?
The spark current oscillates at a frequency (ν), which is a characteristic of the circuit. The changing magnetic field, in turn, induces an electric field so that a series of electrical and magnetic oscillations combine to produce a formation that propagates as an electromagnetic wave.
What is wave propagation discuss various modes of propagation with example?
The waves that propagate near the earth’s surface are called GROUND WAVES. This type of propagation is possible when the transmitting and receiving antenna both are closed to the earth’s surface. The ground waves which travel without any reflection are called Direct waves or Space waves.