didymium

didymium读音音标

英 [daɪ\'dɪmɪəm]

美 [daɪ\'dɪmɪrm]

didymium意思解释

n.

钕镨混合物；

英英释义

Didymium () is a mixture of the elements praseodymium and neodymium. It is used in safety glasses for glassblowing and blacksmithing, especially when a gas (propane) powered forge is used, where it provides a filter which selectively blocks the yellowish light at 589 nm emitted by the hot sodium in the glass, without having a detrimental effect on general vision, unlike dark welder\'s glasses.