Electromagnetic spectrum, types

REGION OF ELECTROMAGNETIC SPECTRUM TYPE OF EXCITATION WAVELENGTH OF PHOTON... 

A university student recently had a busy day. Each of the student s activities on that day (reading, having a dental x-ray, making popcorn in a microwave oven, and getting a suntan) involved radiation from a different part of the electromagnetic spectrum. Complete the following table and match each type of radiation to the appropriate event ... 

Introduction of an ethylene bridge between the maso-carbon atom and one of the diaminophenyl groups of a triarylmethane-type phthalide results in a considerable bathochromic shift, thus producing color formers exhibiting absorption in the near infrared region of the electromagnetic spectrum. 

Close to this limit the displacements of the two types of atom have opposite sign and the two types of atom vibrate out of phase, as illustrated in the lower part of Figure 8.10. Thus close to q = 0, the two atoms in the unit cell vibrate around their centre of mass which remains stationary. Each set of atoms vibrates in phase and the two sets with opposite phases. There is no propagation and no overall displacement of the unit cell, but a periodic deformation. These modes have frequencies corresponding to the optical region in the electromagnetic spectrum and since the atomic motions associated with these modes are similar to those formed as response to an electromagnetic field, they are termed optical modes. The optical branch has frequency maximum at q = 0. As q increases slowly decreases and... 

Look up and list the various types of spectroscopy that have been developed. Describe the various parts of the electromagnetic spectrum available to each type of spectroscopy. 

The increase in energy in a molecule that occurs when radiation is absorbed can be accommodated in the three ways already described. The range of energies involved is characteristic of each type of change and is associated with a well-defined region of the electromagnetic spectrum (Figure 2.3). 

Different types of electromagnetic radiation make up the electromagnetic spectrum. Visible light - the radiation that our eyes can detect - makes up only a small part of the electromagnetic spectrum. 

Clay minerals are ubiquitous up to hundreds of metres from hydrothermal U mineralization, and often there is zoning in the type of alteration minerals (Hoeve Quirt 1984). These can be mapped with remote sensing that can detect in the visible and the middle-infrared sections of the electromagnetic spectrum (Earle et al. 1999). The two oxidation states of U and Fe have been proposed to map bleached... 

CONTINUUM THERMAL RADIATION Radiation which involves the transfer of heat by electromagnetic waves, confined to the relatively narrow window of the electromagnetic spectrum (i.e. visible light around 400 nm to infrared light around 1000 nm). The hot particles in and above hrework flames contribute to this type of radiation. 

The electromagnetic spectrum can be divided into distinct ranges from low-energy long-wave radiation to high-energy short-wave X rays and beyond (Fig. 3). From a spectroscopic point of view, the basis of these different ranges is the nature or type... 

MICROWAVE SPECTROSCOPY. A type of adsorption spectroscopy used in instrumental chemical analysis that involves use of that portion of the electromagnetic spectrum hav ing wavelengths in the range between the far infrared and the radiofrequencies, i.e.. between 1 nun and. 111 cm. Substances to be analyzed are usually in the gaseous state. Klystron tubes are used as microwave source. 

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