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ID number:552025
 
Author:
Evaluation:
Published: 05.06.2006.
Language: Latvian
Level: Secondary school
Literature: 2 units
References: Not used
Extract

UV starojuma dabiskie avoti ir Saule, zvaigznes, miglāji. Īsākā viļņa garuma starojumu absorbē atmosfēra 30 – 200 km augstumā. Spēcīgs UV starojuma avots ir plazma. Praksē par UV starojuma avotiem izmnto dzīvsudraba, ksenona u.c. gāzizlādes lampas, kas laiž cauri UV starojumu.
UV starojuma diapazonā vielu optiskās īpašības atšķiras no to īpašībām gaismas diapazonā. Parastais stikls kļūst necaurspīdīgs UV starojumam, kura viļņa garums nepārsniedz 320nm. Īsākā viļņa garuma UV starojumam caurspīdīgi ir kvarcs, magnija fluorīds, litija fluorīds, safīrs, inertās gāzes.

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