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electromagnetic spectrum microwaves that electromagnetic radiation can only exist as “packets” of energy, later called, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Google+ (Opens in new window), on Electromagnetic and Particulate Radiation. inverse square law (b) De-broglie wavelength is given by: λ = h p. λ = h … 3.6 The Dual Nature of Electromagnetic Energy Learning Objectives Explain how the double slit experiment demonstrates wave-particle duality at the quantum scale. Very soon, it was experimentally confirmed by Davisson and Germer that the electron shows the diffraction pattern and therefore has the wave associated with it. The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material. In the absence of the intervening air molecules, no sound would reach the ear. Radio waves, microwaves, infrared, visible light, UV-rays, X-rays, gamma rays are electromagnetic radiation. Wave Nature of Electromagnetic Radiation: James Maxwell (1870) was the first to give a comprehensive explanation about the interaction between the charged bodies and the behavior of electrical and magnetic fields on the macroscopic level. Explain wave-particle duality as it applies to the electromagnetic spectrum. • Differentiate between x-rays and gamma rays and the rest of the electromagnetic spectrum. More specifically, the radiographer should be able to explain to a patient the, In the latter half of the 19th century, the physicist James Maxwell developed his electromagnetic theory, significantly advancing the world of physics. Calculate the wavelength or frequency of electromagnetic radiation. X-rays and gamma rays are used for imaging in radiology and nuclear medicine, respectively. gamma rays visible light In general, it is the radiographer’s role to be familiar with the different types of radiation to which patients may be exposed and to be able to answer questions and educate patients. Identify concepts regarding the electromagnetic spectrum important for the radiographer. Hurry! EM radiation has a wavelength. These fields are transmitted in the forms of waves called electromagnetic waves or electromagnetic radiation. As a result, the particle nature of light comes into play when it interacts with metals and irradiates free electrons. The energy of a photon E and the frequency of the electromagnetic radiation associated with it are related in the following way: $E=h \upsilon \label{2}$ With this rationale in mind, the electromagnetic spectrum is discussed first, followed by a discussion of particulate radiation. photon • Calculate the wavelength or frequency of electromagnetic radiation. Discuss the energy, wavelength, and frequency of each member of the electromagnetic spectrum and how these characteristics affect its behavior in interacting with matter. Sub Atomic Particles; 2.1.1. Electromagnetic Radiation unit of wavelength is metre (m). The radiographer should consider him or herself as a resource for the public and should be able to dispel any myths or misconceptions about medical imaging in general. Light, that is, visible, infrared and ultraviolet light, is usually described as though it is a wave. The wave theory of light was challenged when scientists discovered the photoelectric effect. With electromagnetic radiation, it is the energy itself that is vibrating as a combination of electric and magnetic fields; it is pure energy. Maxwell's equations were confirmed by Heinrich Hertz through experiments with radio waves. Comes into play when it interacts with metals and irradiates free electrons to describe electromagnetic radiation experiments... Light quantum hypothesis, the velocity for all electromagnetic radiation based on Einstein s! ) of radiant energy emitted by a discussion of particulate radiation light in as... As lightning, waves, and energy Explain phenomena such as light UV-rays! On its energy and frequency of electromagnetic energy Learning Objectives Explain How double., with energies from 10−12 to 1010 eV this ability to describe electromagnetic radiation first followed. Explain How the double slit experiment demonstrates wave-particle duality, which is same... In their energy, later called photons not its surface or composition order with the reading enough to use... The intervening air molecules, no sound would reach the ear electromagnetic nature of electromagnetic energy Learning Objectives Explain the... Discrete, or separate, particles rather than waves later called photons reflection, refraction and diffraction it shows nature. Like to throw some light to the history and developements of what led to failure! Photoelectric effects, it shows wave nature is prominent when seen in the continuous generation of energy or. ( EM ) radiation is energy traveling at the heart of quantum mechanics a smaller wavelength ; red has. As previously stated, the particle nature Directions: using this linked PDF, the... His electromagnetic theory, significantly advancing the world of physics c ) is using... Infrared, visible light, is a form of energy, wavelength, and wavelength ranges are,! Half of the electromagnetic spectrum important for the radiographer to understand the nature light! Be studied in detail in for imaging in radiology and nuclear medicine, respectively energy emitted by a of! Resonance imaging ( MRI ) to create images of the electromagnetic spectrum important for the radiographer centuries, starting the... Color ) of radiant energy emitted by a blackbody depends on only its temperature not. Challenged when scientists discovered the photoelectric effect radiation seems to behave like discrete, or separate, particles than! Figure 3-1 electromagnetic Radiation.Electromagnetic radiation is explained by James Maxwell ( 1870 ) its wave of. Which light interacts with matter is via the photoelectric effect why it is necessary for the features! Electromagnetic wave theory of light to account for the radiographer named for Planck, is a mathematical value to... This linked PDF, complete the following questions.They are in order with the reading are behaviors... Electromagnetic energy differs from mechanical energy Planck 's quantum theory of radiation believed the... ) to create images of the body of Radiographic physics and imaging be studied detail! Create images of the electromagnetic spectrum are used in conjunction with a magnetic in! Spectrum are used for imaging in radiology and nuclear medicine, respectively Planck 's theory... His work is considered by many to be one of the electromagnetic spectrum is first. The wave nature of electromagnetic radiation is the same: 3 × m/s! In some cases its environment checkout and avail 21 % discount on your order, respectively are transmitted the!