UV qarishi quyosh nuri nurlanishining qarishiga tegishli, UV ultrabinafsha (ultrabinafsha) uchun qisqa bo'lib, odatda ultrabinafsha nurlar ostida mahsulotlarning qarish tezligini baholash uchun ishlatiladi. Quyosh nurlarining qarishi ochiq havoda ishlatiladigan materiallarning asosiy qarish zararidir. Uyda ishlatiladigan materiallar uchun, shuningdek, quyosh nuri nurlanishining qarishi yoki sun'iy manbalardan (masalan, ultrabinafsha lampalar, ultrabinafsha diapazonidagi lyuminestsent lampalar kabi) ultrabinafsha nurlar ta'siridan kelib chiqadigan qarish darajasiga duchor bo'lishi mumkin.
The solar radiation is mainly concentrated in the visible part (0.4-0.76 μm), and the wavelength of infrared is larger than that of visible light (>0.76 mkm) va koʻrinadigan ultrabinafsha nurdan kamroq (< 0.4μm)="" less.="" in="" the="" total="" radiation="" energy,="" the="" wavelength="" between="" 0.15="" ~="" 4μm="" accounts="" for="" more="" than="" 99%,="" and="" is="" mainly="" distributed="" in="" the="" visible="" region="" and="" the="" red="" and="" ultraviolet="" region.="" the="" visible="" region="" accounts="" for="" about="" 50%="" of="" the="" total="" solar="" radiation="" energy,="" the="" infrared="" region="" accounts="" for="" about="" 43%,="" the="" ultraviolet="" region="" solar="" radiation="" energy="" is="" very="" little,="" only="" about="" 7%="" of="" the="">
Ultrabinafsha nurlar to'lqin uzunligi {0}},01 dan 0,40 mikrongacha bo'lgan elektromagnit spektrdagi nurlanish uchun umumiy atama bo'lib, insonning ko'rish qobiliyatiga olib kelmaydi. Ultrabinafsha nurlar to'lqin uzunligi 400-315nm, 315-280nm va 280-190nm diapazonlari bilan A, B nurlari va C nurlariga (qisqacha UVA, UVB va UVC) bo'linadi, mos ravishda.
ASTM G154 ga ko'ra, UV (ultrabinafsha) quyosh nurining to'liq spektrini simulyatsiya qila olmaydi. Uning printsipi shundaki, ochiq havoda ta'sir qiladigan bardoshli materiallar uchun 300 dan 400 nm gacha bo'lgan ultrabinafsha nurlarining qisqa to'lqin uzunligi diapazoni qarish shikastlanishining eng muhim sababidir.