# data[].attributes.body
Combinations of fluxuating electric and magnetic fields created by accelerated electric charges propagate out from those charges at the speed of light in the form of waves, electromagnetic waves or radiation.

# data[].attributes.body
They propagate at 300 million meters per second through the vacuum of space.

# data[].attributes.headline
How to describe Electromagnetic waves   B5

# data[].attributes.subject
How to describe Electromagnetic waves   B5

# data[].attributes.body
Electromagnetic waves are transverse waves. In other words, the changing electric and magnetic fields oscillate perpendicular to each other and to the direction of the propagating wave.

# data[].attributes.body
Electromagnetic waves with frequencies between 1 kilohertz and 1 billion hertz are generated commonly by series circuits of coils (inductors) and capacitors connected to antennas.

# data[].attributes.body
The frequency of power waves is the frequency of the alternating current produced by the alternating current generators in electric power plants around the world.

# data[].attributes.body
The ultimate source of all electromagnetic waves is accelerated electric charges. An accelerated charge is one that is increasing or decreasing its speed or changing its direction of motion or both.

# data[].attributes.headline
 How it can be described as  light     B2

# data[].attributes.subject
 How it can be described as  light     B2

# data[].attributes.body
Light can also be described as waves, waves of changing electric and magnetic fields that propagate outward from their sources.

# data[].attributes.body
Almost every aspect of the daily existence of humans is affected, if not guided, by forms of electromagnetic waves or radiation.

# data[].attributes.body
Since all life on Earth is bathed constantly in all forms of electromagnetic radiation, scientists must be cognizant of the potential risks, as well as the benefits, of exposures to electromagnetic waves.

# data[].attributes.body
Each photon possesses an amount of energy that directly depends on the frequency of its associated electromagnetic wave.

# data[].attributes.body
infinite or nearly infinite series of electromagnetic waves emanating from some accelerated charge, light appears to come in particle-like bursts of energy. These individual bursts, or quanta, of energy are called photons.

# data[].attributes.body
Note that all electromagnetic waves are referred to collectively as light or electromagnetic radiation, not merely the narrow range of wavelengths and frequencies indentified as visible light.

# data[].attributes.headline
What is an entire spectrum of EM waves    B8

# data[].attributes.subject
What is an entire spectrum of EM waves    B8

# data[].attributes.body
An entire spectrum of electromagnetic waves exists which ranges from very long-wavelength (low-frequency) waves to very short-wavelength (high-frequency) waves.

# data[].attributes.body
All periodic waves, whether they are electromagnetic or mechanical, are characterized by such properties as wavelength, frequency, and speed.

# data[].attributes.headline
     How it can be similar to natural phenomenas           B3

# data[].attributes.subject
     How it can be similar to natural phenomenas           B3

# data[].attributes.body
Many natural phenomena exhibit wavelike behavior. Water waves, earthquake waves, and sound waves all require a medium or substance through which to propagate.

# data[].attributes.body
Radio waves include the familiar amplitude modulation (AM), frequency modulation (FM), short wave, and citizen's band, as well as the many television bands.

# data[].attributes.body
electromagnetic waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.

# data[].attributes.body
At still higher frequencies and shorter wavelengths, microwaves are often generated in electron tubes called magnetrons.

# data[].attributes.body
Electrons oscillate in a given circuit and on the antenna wire, thereby generating radio waves.

# data[].attributes.body
Electromagnetic Waves. By: Sparks, Donald M., Salem Press Encyclopedia of Science, 2020

# data[].attributes.body
the work of many researchers enabled the use of electronics to convert signals into high frequency oscillating currents, and via suitably shaped conductors, electricity permits the transmission and reception of these signals via radio waves over very long distances.