Mell Are the divisions of the electromagnetic spectrum distinct?
The electromagnetic spectrum, showing the major categories of electromagnetic waves. The range of frequencies and wavelengths is remarkable. The dividing line between some categories is distinct, whereas other categories overlap.
Why is the EM spectrum important?
These observations enable astronomers to determine certain physical characteristics of objects, such as their temperature, composition and velocity. The electromagnetic spectrum consists of much more than visible light. It includes wavelengths of energy that human eyes can’t perceive.
How are the seven divisions of the electromagnetic spectrum related?
Each portion of the spectrum interacts with matter in a slightly different way and is given a different name. From longest to shortest wavelength the seven divisions are: Earth’s atmosphere hides most electromagnetic radiation from space except visible light, certain infrared frequencies and radio waves.
How are the different types of electromagnetic radiation classified?
Wavelengths of electromagnetic radiation, no matter what medium they are traveling through, are usually quoted in terms of the vacuum wavelength, although this is not always explicitly stated. Generally, electromagnetic radiation is classified by wavelength into radio wave, microwave, infrared, visible light, ultraviolet, X-rays and gamma rays.
Where do EM waves originate in the electromagnetic spectrum?
EM waves originate from the vibration of charged particles, and they can travel without a medium. The electromagnetic spectrum describes the vast range of frequencies, from the lowest frequency radio waves to the highest frequency gamma rays.
Are there any overlaps in the electromagnetic spectrum?
This is probably a good time to point out that the EM spectrum regions do overlap a little. For example, some of the low frequency infrared waves can also be considered microwaves, while some of the higher infrared waves overlap with the visible light range.