The electromagnetic spectrum is a continuous range of electromagnetic waves, encompassing a vast range of frequencies or wavelengths. The accepted or agreed-upon division of the electromagnetic spectrum into specific regions or bands may vary depending on the field of study or application. However, the commonly recognized divisions of the electromagnetic spectrum are as follows:
Radio Waves: This region covers the lowest frequencies in the electromagnetic spectrum, typically from a few hertz (Hz) up to hundreds of gigahertz (GHz).
Microwaves: This region covers frequencies ranging from around 300 megahertz (MHz) up to several hundred gigahertz (GHz).
Infrared: This region covers frequencies ranging from around 300 GHz up to several hundred terahertz (THz).
Visible Light: This is the small region of the electromagnetic spectrum that is visible to the human eye, spanning wavelengths from approximately 400 to 700 nanometers (nm).
Ultraviolet: This region covers frequencies ranging from several hundred terahertz (THz) up to several petahertz (PHz).
X-rays: This region covers frequencies ranging from several petahertz (PHz) up to several exahertz (EHz).
Gamma Rays: This is the highest-frequency region of the electromagnetic spectrum, typically above several exahertz (EHz).
It's important to note that the division of the electromagnetic spectrum is not fixed and can vary depending on the context. Additionally, different fields of study, such as physics, astronomy, or telecommunications, may have slightly different conventions or subdivisions within the electromagnetic spectrum.
Therefore, instead of specifying a specific percentage of the entire electromagnetic spectrum that is accepted or agreed upon, it is more accurate to describe the different regions or bands within the spectrum that are commonly recognized and utilized in various applications and scientific disciplines.