The flow of energy at the universal speed of light through free space or through a material medium in the form of the electric and magnetic fields that make up electromagnetic waves such as radio waves, visible light, and gamma rays in classical physics s called Electromagnetic energy and spectrum .
Time-varying electric and magnetic fields are mutually linked at right angles and perpendicular to the direction of motion in such a wave. The intensity and frequency v of the time variation of the electric and magnetic fields define an electromagnetic wave.
Electromagnetic energy (EME), also known as electromagnetic radiation (EMR), is the energy stored in an electromagnetic field.
It is an energy propagated in the form of and advancing interaction between electric and magnetic fields.
All electromagnetic radiation moves at the speed of light.
Electromagnetic spectrum is a continuous sequence of electromagnetic energy arranged according to wavelength or frequency.
the modern quantum theory electromagnetic radiation is the flow of photon (also called light quanta) through space.
The entire frequency or wavelength distribution of electromagnetic radiation Despite the fact that all electromagnetic waves travel at the speed of light in a vacuum, they do so at a wide range of frequencies, wavelengths, and photon energies.
The electromagnetic spectrum includes all electromagnetic radiation and is divided into many subranges, which are commonly referred to as portions, such as visible light or ultraviolet radiation.
The various portions have different names due to differences in the emission, transmission, and absorption of the corresponding waves, as well as their various practical applications. Because there are no precise accepted boundaries between these contiguous portions, the ranges tend to overlap.
From the lowest to the highest frequency (longest to shortest wavelength), the electromagnetic spectrum includes all radio waves commercial radio and television, microwaves, radar), infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Spectroscopy can be performed on nearly all frequencies and wavelengths of electromagnetic radiation.