不管你用什么产品，都应该只发出可见光，因为紫外线会伤害眼睛。
Whatever product you use should emit only visible light, because ultraviolet light damages the eyes.
在尘埃云中心的细丝发出微弱的红色荧光，这是由于一些尘埃微粒能有效地将恒星发出的不可见紫外线转换成可见的红光。
Central filamentsof the dusty clouds glow with a faint reddish photoluminesence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light.
吸收性材料通常只能吸收紫外线和可见光——但这种新材料还能够吸收红外和远红外光线。
Absorbent material usually pulls in ultraviolet and visible light - but this new material also captures infrared and far infrared light.
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