Light infrared

Quack M 1979 Master equations for photochemistry with intense infrared light Ber. Bunsenges. Phys. Chem. 83 757-75... 

Boron is electron deficient relative to carbon. Therefore, small amounts of boron, replacing carbon in a diamond lattice, causes electron holes. As electrons move to fill these lattice vacancies, infrared light is absorbed causing the blue color of the Hope diamond and other blue diamonds. 

Beyond the complexities of the dispersive element, the equipment requirements of infrared instrumentation are quite simple. The optical path is normally under a purge of dry nitrogen at atmospheric pressure thus, no complicated vacuum pumps, chambers, or seals are needed. The infrared light source can be cooled by water. No high-voltage connections are required. A variety of detectors are avail-... 

Short- and long-term drift in the spectral output can be caused by several factors drift in the output of the infrared light source or of the electronics, aging of the beam splitter, and changes in the levels of contaminants (water, CO2, etc.) in the optical path. These problems are normally eliminated by rapid, routine calibration procedures. 

In the gas correlation techniques, gas-filled cells mounted on a rotating disk cross the analyzing infrared beam in turn. One correlation cell is filled with a gas that will not absorb infrared light, such as nitrogen (N2). The other cell (or cells) are filled with a high concentration of the gas to be measured. The wavelength range is selected at the absorption band of the gas to be measured by an optical band-pass filter. 

Fourier transform infrared (FTIR) analyzers can be used for industrial applications and m situ measurements in addition to conventional laboratory use. Industrial instruments are transportable, rugged and relatively simple to calibrate and operate. They are capable of analyzing many gas components and determining their concentrations, practically continuously. FTIR analyzers are based on the spectra characterization of infrared light absorbed by transitions in vibrational and rotational energy levels of heteroatomic molecules. 

Beams of invisible infrared light shone across an opening will detect movement that breaks the beam. Although relatively cheap, beam devices are easily recognized and avoided, and therefore constitute low security. 

Frei H. Chemistry with Red and Near Infrared Light Chimia 1991 45 175 190... 

When you bake in the sun, your body absorbs energy from sunlight. Infrared radiation from a heat lamp in a restaurant keeps food warm until the server delivers the meal to the customer. When a microwave oven cooks food, the food absorbs energy from microwave radiation. Sunlight, infrared light, and microwaves are examples of electromagnetic radiation, which possesses radiant energy, as we discuss in Chapter 7. 

Electric eye door openers use photoconductors that respond to infrared light with a wavelength (d) of 1.5 pm. Which is suitable for photoconductors operating at this wavelength, germanium Eg — 64 kJ/mol) or silicon Eg = 105 kJ/mol) ... 

Ezzaouia H, Heindl R, Parsons R, Tributsch H (1983) Visible light photo-oxidation of water with single-crystal RuS2 electrodes. J Electroanal Chem 145 279-292 Kiihne HM, Tributsch H (1983) Oxygen evolution from water mediated by infrared light on iron doped RuS2 electrodes. J Electrochem Soc 130 1448-1450... 

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