紫外線(しがいせん)

しがいせん
noun
ultraviolet rays; UV rays
science
1. ultraviolet rays; UV rays
Electromagnetic radiation from the sun with wavelengths shorter than visible light. Can cause sunburn and skin damage.
夏(なつ)は紫外線(しがいせん)が強(つよ)い。
UV rays are strong in summer.
I applied sunscreen as a UV protection measure.
UV rays have harmful effects on the skin.
I wore a hat to protect my skin from UV rays.
UV rays are present even on cloudy days, so don't let your guard down.

Forms

紫(むらさき)外(がい) (beyond purple) + 線(せん) (rays) - named because these rays are beyond the violet end of the visible spectrum

Common collocations

Related words