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Chapter 21: Problem 21

Briefly describe the three absorption mechanisms in nonmetallic materials.

Short Answer

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Question: Briefly describe the three absorption mechanisms in nonmetallic materials. Answer: The three absorption mechanisms in nonmetallic materials are Electron Transition, Vibration, and Synchrotron Radiation. Electron Transition involves the movement of electrons between energy levels within atoms, absorbing specific wavelengths of light in the process. Vibration, or vibrational absorption, involves the excitation of vibrational modes of atoms or molecules due to absorbed light, leading to a decrease in transmitted or reflected light intensity. Synchrotron Radiation occurs when charged particles emit radiation in a strong magnetic field, which can be absorbed by atoms or molecules in the material, affecting its absorption properties.

Step by step solution

01

Electron Transition

Electron transition is an absorption mechanism in nonmetallic materials that involves the movement of electrons from one energy level to another within the atoms that compose the material. When light with a specific wavelength is absorbed by an atom, it provides the energy needed for an electron to jump from a lower energy level to a higher one. This process reduces the intensity of the incident light, and as a result, the material absorbs that specific wavelength from the light spectrum.
02

Vibration

Vibration, also known as vibrational absorption, is an absorption mechanism in nonmetallic materials that involves the vibration of atoms or molecules within the material. When light with a specific wavelength is absorbed by the material, the energy from the light excites the vibrational modes of the atoms or molecules in the material. This process results in absorption of the light's energy and a decrease in the intensity of the transmitted or reflected light. Typical examples of materials exhibiting vibrational absorption include polymers, glass, and organic materials.
03

Synchrotron Radiation

Synchrotron radiation is an absorption mechanism in nonmetallic materials that involves the emission of electromagnetic radiation by charged particles, such as electrons, when they are subjected to a strong magnetic field. This radiation can be absorbed by atoms or molecules within the material, causing a decrease in the intensity of the incident light. While this mechanism is less common than the other two mechanisms, it can significantly impact the absorption properties of certain materials under specific conditions, such as those found in synchrotron light sources or particle accelerators.

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Most popular questions from this chapter

(a) In your own words, briefly describe the phenomenon of luminescence. (b) What is the distinction between fluorescence and phosphorescence?

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