Because lower Frequencies are for long range whereas higher frquecies such as microwave go much shorter distances such as line of sight but can carry more information due to the complexity of the waveform. Do a search for spectrum management and im sure you can find what you are looking for. I just think of a radio wave as the least complex because it is a low frequency and has lots of power behind it to broadcast to a big audience by blanketing a large surface whereas a satellite is a small complex antenna that discharges a high frequecy burst from point to point but can carry alot more information.
Frequency is how close waves follow one another, usually given for one second of time. This can alos be measure in the length between successive waves. For example, a frequency of 14.5 megaHertz has a wavelength of about 20 meters. For electromagnetic waves, the relationship is simple: Energy of the photon equals the frequency of the EM wave times Planck's Constant.
This depends on frequency. The lower the frequency the easier it is for the waves to refract around a corner, while higher frequencies generally only follow straight lines.
Radio waves are the lowest frequency waves. Next are microwaves, then infra-red waves.
Periodic waves are characterized by a frequency, a wavelength, and by their speed.
the electromagnetic waves are organized from low to high frequency.
The wave that can travel through earth and along earths surface is a SEISMIC wave.
L waves are formed when P&S waves reach the surface.
Ground waves are radio waves which travel along the earths surface while sky waves use the earths ionosphere to reflect signals to the desired destination
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L waves are formed when P&S waves reach the surface.
the one with the most damege is the surface wave because they are on the surface of earth. but p-waves are the second and s-waves are the third
waves that travels only on the surface
This is known as the epicentre.
earthquakes :)
Radio waves are one example.
Because the vibrations of both the waves travel parallel to the direction of propagation of waves. For eg: both the waves have amplitude, frequency etc.
Because of their low frequency, long duration, and large amplitude