CHEMISTRY GLOSSARY
electromagnetic radiation spectrum → spektar elektromagnetskog zračenja
Wavelengths of electromagnetic waves can be shown with the help of electromagnetic radiation spectrum. Electromagnetic radiation spectrum is divided into several areas from γ-radiation of very short wavelengths and great energy to radio waves with wavelengths up to 1 000 m. The human eye can only see a narrow part of the electromagnetic spectrum - visible radiation.
line spectrum → linijski spektar
Red-hot gases give line spectrum, i.e. is they emit electromagnetic rays of defined wavelengths. That kind of emission line of spectrum is characteristic of each chemical element.
electromagnetic wave → elektromagnetski val
All matter absorbs and emits radiation covering a broad band of frequencies and wavelengths. Thus electromagnetic radiation has the velocity of light (2.998×108 ms-1) and arises from the vibrating electric charges in atoms and bonds. The range of wavelengths, also known as the electromagnetic spectrum, is shown below:
X-ray spectrum → spektar X-zraka
X-ray spectrum is a set of characteristic X-ray frequencies or wavelengths produced by a substance used as a target in an X-ray tube. Each element has a characteristic X-ray spectrum, and there is a strong correlation between atomic number and the frequencies of certain lines in the X-ray spectrum.
infrared radiation → infracrveno zračenje
Infrared radiation is an electromagnetic radiation within the area from 1.0 μm to 300 μm, and is responsible for the transmission of radiant heat.
ultraviolet light → ultraljubičasto svjetlo
Ultraviolet light (UV light or UV radiation) is an electromagnetic radiation with a wavelength longer than that of x-rays, but shorter than that of visible light. Ultraviolet light can break some chemical bonds and cause cell damage.
visible radiation → vidljivo zračenje
Human eye can only see electromagnetic radiation of wavelengths form 400 nm to 760 nm. This narrow part of electromagnetic spectrum is called visible radiation. Visible (white) light is a mixture of light of all kind of colours, it can be separated, with the help of a glass prism, into its component colours - visible light spectrum, and each colour corresponds to a certain area of wavelengths:
| Colour | Wavelength / nm |
|---|---|
| purple | 400 - 450 |
| blue | 450 - 500 |
| green | 500 - 570 |
| yellow | 570 - 590 |
| orange | 590 - 620 |
| red | 620 - 760 |
absorption coefficient → apsorpcijski koeficijent
Absorption coefficient (a) is the relative decrease in the intensity of a collimated beam of electromagnetic radiation, as a result of absorption by a medium, during traversal of an infinitesimal layer of the medium, divided by the length traversed.
atomic absorption spectroscopy → atomska apsorpcijska spektroskopija
Atomic absorption spectroscopy (AAS) An analytical technique in which a sample is vapourised and the nonexcited atoms absorb electromagnetic radiation at characteristic wavelengths.
Citing this page:
Generalic, Eni. "Elektromagnetski spektar." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. 6 Apr. 2025. <https://glossary.periodni.com>.
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