Infrared radiation, electromagnetic wavelengths

Infrared radiation, electromagnetic spectrum and, 419, 422 energy of. 422 frequencies of, 422 wavelengths of, 422 Infrared spectroscopy, 422-431 acid anhydrides, 822-823 acid chlorides, 822-823 alcohols. 428, 632-633 aldehydes, 428. 730-731 alkanes, 426-427 alkenes, 427 alkynes, 427 amides. 822-823 amines, 428, 952 ammonium salts, 952-953 aromatic compound, 427-428, 534 bond stretching in, 422... 

Infrared Radiation Electromagnetic radiation wdth wavelengths between microwaves and visible red light. 

Warm objects emit electromagnetic radiation in the infrared region. Heat lamps employ this principle to generate infrared radiation. Water absorbs infrared radiation with wavelengths near 2.80 fim. Suppose this radiation is absorbed by the water and converted to heat. A 1.00-L sample of water absorbs infrared radiation, and its temperature increases from 20.0°C to 30.0°C. How many photons of this radiation are used to heat the water ... 

Infrared radiation Long wavelength, low frequency electromagnetic radiation (below red)... 

Thermal radiation is electromagnetic radiation covering wavelengths from 2 to 16 p,m (infrared). It is the net result of radiation emitted by radiating substances such as HjO, CO2, and soot (often dominant in fireballs and pool fires), absorption by these substances, and scatter. This section presents general methods to describe... 

Infrared radiation is electromagnetic radiation lying at longer wavelengths (lower frequencies) than red light a typical wavelength is about 1000 nm. A wavelength of 1000 nm corresponds to a frequency of about 3 X 1014 Hz, which is comparable to the frequency at which molecules vibrate. Therefore, molecules can absorb infrared radiation and become vibrationally excited. 

In the electromagnetic spectrum, microwave radiation occurs in an area of transition between infrared radiation and radiofrequency waves, as shown in Fig. 1.1. The wavelengths are between 1 cm and 1 m and frequencies between 30 GHz and 300 MHz. 

Optical principles are based on the fact that technical gases have distinct absorption spectra in different wavelength ranges of electromagnetic radiation. The widespread infrared spectral photometries uses the fact, that certain gases absorb infrared radiation in a characteristic manner. 02 and N2 are IR-inactive and therefore other compounds in air or flue gas can be easily detected. This technique has a very high selectivity for single compounds and shows only a few cross-sensitivities. 

IR, infrared radiation This type of electromagnetic radiation has a wavelength that ranges from 0.75 to 500 xm. 

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