particle nature of electromagnetic radiation is explained by

particle nature of electromagnetic radiation and planck's quantum theory The electromagnetic wave theory of radiation believed in the continuous generation of energy. The key difference between wave and particle nature of light is that the wave nature of light states that light can behave as an electromagnetic wave, whereas the particle nature of light states that light consists of particles called photons. With this rationale in mind, the electromagnetic spectrum is discussed first, followed by a discussion of particulate radiation. This question can be answered both broadly and specifically. For a photon: P = h v c. Therefore, h p = c v = λ. The wave model of light cannot explain why heated objects emit only certain [frequencies] of light at a given temperature, or why some metals emit [electrons] when light of a specific frequency shines on them. This question about the nature of electromagnetic radiation was debated by scientists for more than two centuries, starting in the 1600s. One way in which light interacts with matter is via the photoelectric effect, which will be studied in detail in . Blue light has a smaller wavelength; red light has a longer wavelength. The major significance of the wave-particle duality is that all behavior of light and matter can be explained through the use of a differential equation which represents a wave function, generally in the form of the Schrodinger equation. Introduction The constant, h, which is named for Planck, is a mathematical value used to calculate photon energies based on frequency. Only photons whose energy exceeds a threshold value will cause emission of photoelectrons. Electromagnetic radiation is a form of energy that originates from the atom. In this theory he explained that all electromagnetic radiation is very similar in that it has no mass, carries energy in waves as electric and magnetic disturbances in space, and travels at the speed of light (Figure 3-1). He or she should also understand the nature of radiation well enough to safely use it for medical imaging purposes. • Describe the nature of particulate radiation. One difference between the “ends” of the spectrum is that only high-energy radiation (x-rays and gamma rays) has the ability to ionize matter. The wave theory of light was challenged when scientists discovered the photoelectric effect. With this rationale in mind, the electromagnetic spectrum is discussed first, followed by a discussion of particulate radiation. This chapter introduces the nature of electromagnetic and particulate radiation. 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. Students may wonder why it is necessary for the radiographer to understand the entire spectrum of radiation. Planck theorized that electromagnetic radiation can only exist as “packets” of energy, later called photons. But, at the beginning of the 20th century, scientists had begun to question the w… The energy of the electromagnetic spectrum ranges from 10-12 to 1010 eV. The energy of the electromagnetic spectrum ranges from 10-12 to 1010 eV. Rather, the energy itself vibrates. Electromagnetic radiation may be defined as “an electric and magnetic disturbance traveling through space at the speed of light.” The electromagnetic spectrum is a way of ordering or grouping the different electromagnetic radiations. electromagnetic radiation radioactivity Electromagnetic energy differs from mechanical energy in that it does not require a medium in which to travel. Both ends of the electromagnetic spectrum are used in medical imaging. Key Ideas and Terms Notes Define frequency. The energy is measured in electron volts (eV). Differentiate between x-rays and gamma rays and the rest of the electromagnetic spectrum. With electromagnetic radiation, it is the energy itself that is vibrating as a combination of electric and magnetic fields; it is pure energy. Thus, De-Broglie equation equals the wavelength of em radiation of which the photon is a quantum of energy and momentum. alpha particles Related photon 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. 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. Electromagnetic energy differs from mechanical energy in that it does not require a medium in which to travel. The Particle Nature of Light 1. That is, electromagnetic radiations are emitted when changes in atoms occur, such as when electrons undergo orbital transitions or atomic nuclei emit excess energy to regain stability. FIGURE 3-1 Electromagnetic Radiation.Electromagnetic radiation is energy traveling at the speed of light in waves as an electric and magnetic disturbance in space. Critical Concept 3-2 v = particle speed. • Calculate the wavelength or frequency of electromagnetic radiation. Maxwell's equations were confirmed by Heinrich Hertz through experiments with radio waves. 06.11 Hess’s Law and Enthalpies for Different Types of Reactions. • Calculate the wavelength or frequency of electromagnetic radiation. microwaves You may also needX-ray Interactions with MatterImage ProductionThe X-ray CircuitRadiographic Exposure TechniqueIntroduction to the Imaging SciencesX-ray ProductionAdditional EquipmentStructure of the Atom This question can be answered both broadly and specifically. As previously stated, the velocity for all electromagnetic radiation is the same: 3 × 108 m/s. • Identify concepts regarding the electromagnetic spectrum important for the radiographer. \n Particle/wave nature of electromagnetic radiation \n \n visible light Describe the nature of the electromagnetic spectrum. When electromagnetic (EM) radiation is explained using the particle model, which particle-like behavior is being described? Electromagnetic radiation can be defined as a form of energy that is produced by the movement of electrically charged particles traveling through a matter or vacuum or by oscillating magnetic and electric disturbance. The energy is measured in electron volts (eV). The energy of electromagnetic radiation can be calculated by the following formula: In this formula, E is energy, h is Planck’s constant (equal to 4.15 × 10-15 eV-sec), and f is the frequency of the photon. Chemistry Journal 2.2 Electromagnetic Radiation Driving Question: How does the nature of particles, waves, and energy explain phenomena such as lightning? I would like to throw some light to the history and developements of what led to the failure of the wave nature of light. Identify concepts regarding the electromagnetic spectrum important for the radiographer. Wavelength, Only gold members can continue reading. As previously stated, the velocity for all electromagnetic radiation is the same: 3 × 108 m/s. The wavelengths of the electromagnetic spectrum range from 106 to10-16 meters (m) and the frequencies range from 102 to 1024 hertz (Hz). Electromagnetic radiations are characterized by the properties − frequency ( v) and wave length (λ). Electromagnetic radiation exhibits properties of a wave or a particle depending on its energy and in some cases its environment. • Differentiate between electromagnetic and particulate radiation. It also is a spectrum consisting of radio waves, microwaves, infrared waves, visible light, ultraviolet radiation, X-rays, and gamma rays. Discovery of Electron; 2.1.2. Applying Einstein's special theory of relativity, the relationship between energy (E) and momentum (p) of a particle is E = [ (pc) 2 + (mc 2) 2] (1/2) where m is the rest mass of the particle and c is the velocity of light in a vacuum. EM radiation can exhibit interference patterns. • Describe the nature of the electromagnetic spectrum. Electromagnetic radiation exhibits properties of a wave or a particle depending on its energy and in some cases its environment. They all have the same velocity—the speed of light—and vary only in their energy, wavelength, and frequency. (1 point) EM radiation has a frequency EM radiation can move through space without a medium. Define waves. Conceptually we can talk about electromagnetic radiation based on its wave characteristics of velocity, amplitude, wavelength, and frequency. 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