Electromagnetic Spectrum Wavelength And Frequency Table Pdf

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The Electromagnetic Spectrum

The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The electromagnetic spectrum of an object has a different meaning: it is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.

The electromagnetic spectrum extends from below the low frequencies used for modern radio communication to gamma radiation at the short-wavelength high-frequency end, covering wavelengths from thousands of kilometers down to a fraction of the size of an atom. The limit for long wavelengths is the size of the universe itself, while it is thought that the short wavelength limit is in the vicinity of the Planck length 1. Most parts of the electromagnetic spectrum are used in science for spectroscopic and other probing interactions, as ways to study and characterize matter.

In general, if the wavelength of electromagnetic radiation is of a similar size to that of a particular object atom, electron, etc. In addition, radiation from various parts of the spectrum has been found to have many other uses in communications and manufacturing. Frequencies observed in astronomy range from 2.

Wavelength is inversely proportional to wave frequency; hence, gamma rays have very short wavelengths that are a fraction of the size of atoms, whereas other wavelengths can be as long as the universe. Photon energy is directly proportional to the wave frequency, so gamma ray photons have the highest energy around a billion electron volts , while radio wave photons have very low energy around a femto-electron volt.

These relations are illustrated by the following equations:. Whenever electromagnetic waves exist in a medium with matter, their wavelength is decreased. 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, terahertz or sub-millimeter radiation, infrared, the visible region we perceive as light, ultraviolet, X-rays, and gamma rays. The behavior of electromagnetic radiation depends on its wavelength. When electromagnetic radiation interacts with single atoms and molecules, its behavior also depends on the amount of energy per quantum photon it carries. Electromagnetic radiation interacts with matter in different ways in different parts of the spectrum.

The types of interaction can be so different that it seems justified to refer to different types of radiation. At the same time, there is a continuum containing all these different kinds of electromagnetic radiation. Thus, we refer to a spectrum, but divide it up based on the different interactions with matter.

Below are the regions of the spectrum and their main interactions with matter:. This classification goes in the increasing order of frequency and decreasing order of wavelength, which is characteristic of the type of radiation. While, in general, the classification scheme is accurate, in reality there is often some overlap between neighboring types of electromagnetic energy.

For example, SLF radio waves at 60 Hz may be received and studied by astronomers, or may be ducted along wires as electric power, although the latter is, in the strict sense, not electromagnetic radiation at all. Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:. Skip to main content. Introduction to Quantum Theory. Search for:. Electromagnetic Spectrum. Learning Objective Calculate frequency or photon energy, identify the three physical properties of electromagnetic waves.

Key Points The electromagnetic spectrum includes common regimes such as ultraviolet, visible, microwave, and radio waves. The spectrum can be ordered according to frequency or wavelength. The types of interaction can range from electronic excitation to molecular vibration depending on the different types of radiation, such as ultraviolet, X-rays, microwaves, and infrared radiation.

Show Sources Boundless vets and curates high-quality, openly licensed content from around the Internet. Licenses and Attributions. CC licensed content, Shared previously.

Electromagnetic spectrum

The electromagnetic spectrum ranges from the shorter wavelengths including gamma and x-rays to the longer wavelengths including microwaves and broadcast radio waves. There are several regions of the electromagnetic spectrum which are useful for remote sensing. For most purposes, the ultraviolet or UV portion of the spectrum has the shortest wavelengths which are practical for remote sensing. This radiation is just beyond the violet portion of the visible wavelengths, hence its name. Some Earth surface materials, primarily rocks and minerals, fluoresce or emit visible light when illuminated by UV radiation. The light which our eyes - our "remote sensors" - can detect is part of the visible spectrum. It is important to recognize how small the visible portion is relative to the rest of the spectrum.


Energy Transfer by Waves. • Wave. – A traveling disturbance. • Properties of waves. – Wavelength. – Frequency. – Velocity. – Amplitude.


electromagnetic spectrum worksheet pdf

The electromagnetic spectrum is the range of frequencies the spectrum of electromagnetic radiation and their respective wavelengths and photon energies. The electromagnetic spectrum covers electromagnetic waves with frequencies ranging from below one hertz to above 10 25 hertz, corresponding to wavelengths from thousands of kilometers down to a fraction of the size of an atomic nucleus. This frequency range is divided into separate bands, and the electromagnetic waves within each frequency band are called by different names; beginning at the low frequency long wavelength end of the spectrum these are: radio waves , microwaves , infrared , visible light , ultraviolet , X-rays , and gamma rays at the high-frequency short wavelength end.

The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The electromagnetic spectrum of an object has a different meaning: it is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. The electromagnetic spectrum extends from below the low frequencies used for modern radio communication to gamma radiation at the short-wavelength high-frequency end, covering wavelengths from thousands of kilometers down to a fraction of the size of an atom. The limit for long wavelengths is the size of the universe itself, while it is thought that the short wavelength limit is in the vicinity of the Planck length 1. Most parts of the electromagnetic spectrum are used in science for spectroscopic and other probing interactions, as ways to study and characterize matter.

The learning objectives in this section will help your students master the following standards.

16.6: The Electromagnetic Spectrum

In this module we examine how electromagnetic waves are classified into categories such as radio, infrared, ultraviolet, and so on, so that we can understand some of their similarities as well as some of their differences. We will also find that there are many connections with previously discussed topics, such as wavelength and resonance. A brief overview of the production and utilization of electromagnetic waves is found in Table There are many types of waves, such as water waves and even earthquakes. Among the many shared attributes of waves are propagation speed, frequency, and wavelength. This module concentrates on EM waves, but other modules contain examples of all of these characteristics for sound waves and submicroscopic particles. Thus, for all electromagnetic waves, the greater the frequency, the smaller the wavelength.

Electromagnetic spectrum , the entire distribution of electromagnetic radiation according to frequency or wavelength. Although 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 comprises the span of all electromagnetic radiation and consists of many subranges, commonly referred to as portions, such as visible light or ultraviolet radiation. The various portions bear different names based on differences in behaviour in the emission, transmission, and absorption of the corresponding waves and also based on their different practical applications. There are no precise accepted boundaries between any of these contiguous portions, so the ranges tend to overlap.

EM radiation is classified into types according to the frequency of the wave: these types include, in order of increasing frequency, radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays. Table Examples of some uses of electromagnetic waves are shown in Table Sign up to get a head start on bursary and career opportunities. Use Siyavula Practice to get the best marks possible. Arrange the following types of EM radiation in order of increasing frequency: infrared, X-rays, ultraviolet, visible, gamma. Give an example of the use of each type of EM radiation, i.


The frequency of a wave is the number of waves per second. What does "​wavelength" mean? The wavelength is the distance from the peak of one wave to the next.


9.3: The Electromagnetic Spectrum

Electromagnetic waves have a vast range of practical everyday applications that includes such diverse uses as communication by cell phone and radio broadcasting, WiFi, cooking, vision, medical imaging, and treating cancer. In this module, we discuss how electromagnetic waves are classified into categories such as radio, infrared, ultraviolet, and so on. We also summarize some of the main applications for each range.

Visible light radiation that comes from a lamp in someone s house or radio wave radiation that comes from a radio station are two types of electromagnetic radiation. Good companion worksheet to a textbook chapter on Light and the Electromagnetic Spectrum. Some of the worksheets for this concept are Critical thinking activity the electromagnetic spectrum, Waves work answers, Electromagnetic waves work answers, Waves review work answers, 13 03, Electromagnetic waves work, Chapter 12 electromagnetic waves, Electromagnetic spectrum work.

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