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Characteristics of Radio waves

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jennifer devlin

on 27 April 2015

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Transcript of Characteristics of Radio waves

Characteristics of Radio waves
Wavelength: 1 millimetre to 100 kilometres
Frequency: 300GHz to as low as 3GHz
Velocity: Same as that of light, 300 000km per second

AM (amplitude modulated) radio waves are within a frequency range of 550 KHz and 1600KHz

FM (frequency modulated) radio waves are within a frequency range of 88 MHz and 108 MHz

What energy is being transferred
Kinetic energy and electrical/magnetic energy is being transferred through radio waves. Radio waves consist of electric and magnetic fields that continuously recreate each other and will push any electric charges they encounter. Both electric and magnetic fields contain energy. In a radio wave, this energy moves along with the fields.

Radio Waves
The angle at which a radio wave is reflected from a smooth metal surface (also called the angle of reflectance) is always equal to the angle at which it approached the surface (also called the angle of incidence). When a signal is reflected there is normally some loss of the signal, either through absorption, or as a result of some of the signal passing into the medium. A variety of surfaces can reflect radio waves the sea, warehouses, buildings, metal and concrete
Reflection: an amount of light, heat, or sound that is reflected by a body or surface.

Radio waves almost always travel through space in a straight line. There are two exceptions. One is that radio waves are pulled and turn slightly because of gravity when they pass by large masses. The other exception is that radio waves can be reflected by certain substances, like the way that a mirror reflects light.
How radio waves interrelate and vary from other wave types
Radio waves have the same velocity as any other electromagnetic wave, which is the speed of light (300 000km/second). Radio waves differ from other ways by their frequencies and wavelengths. Radio waves have the longest wavelength in the whole electromagnetic spectrum. Gamma rays have the highest frequency and the shortest wavelength. The shorter the wavelength, the higher the frequency. X-rays and gamma-rays are usually described in terms of energy, optical and infrared light in terms of wavelength, and radio in terms of frequency.
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