infrared spectrum
Học thuậtThân thiện
Definition
Noun: The range of electromagnetic wavelengths that are longer than visible red light but shorter than microwaves, typically from about 700 nanometers to 1 millimeter. It is the part of the electromagnetic spectrum associated with heat radiation.
Usage
The term "infrared spectrum" refers specifically to the entire band or range of infrared radiation. It is used in scientific and technical contexts to discuss the properties, analysis, or application of this type of light. * Scientists analyze the infrared spectrum emitted by stars to determine their composition. * This camera is sensitive to the infrared spectrum, allowing it to see heat signatures. * The molecule's absorption bands are located in the infrared spectrum.
Advanced Usage
- Near-infrared (NIR) spectrum: The region of the infrared spectrum closest to visible light, often used in fiber optics and remote controls.
- Mid-infrared (MIR) spectrum: A region commonly used for chemical analysis and sensing, as many molecules have fundamental vibrational frequencies here.
- Far-infrared (FIR) spectrum: The region bordering microwaves, associated with lower-energy rotational transitions in molecules.
Variants and Related Words
- Infrared (IR) (adj/n): Of, relating to, or using infrared radiation. (e.g., , ).
- Spectrum (n): A band of colors, as seen in a rainbow, or more broadly, the entire range of wavelengths of electromagnetic radiation.
- Spectroscopy (n): The study of the interaction between matter and electromagnetic radiation, often involving analysis of spectra like the infrared spectrum.
Synonyms
- IR spectrum
- Thermal radiation spectrum (in a general context, though not precisely synonymous)
Related Phrases
- Infrared spectroscopy: An analytical technique that uses the infrared spectrum to identify chemicals.
- Infrared astronomy: The branch of astronomy that observes and interprets the infrared spectrum from celestial objects.
Noun
- the spectrum of infrared radiation