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Fascinating. Let me get this straight: If you have a piece of phosphor, you can't heat it up with red light, regardless of the amount of red light you shine at
by Jyaif 3y ago
Fascinating.
Let me get this straight: If you have a piece of phosphor, you can't heat it up with red light, regardless of the amount of red light you shine at it?
If so, does the red light bounce off? Go straight through?
- _ph_ 3y agoYes, it will of course absorb or reflect the red light like any stone would, but to "charge" its luminiszence you need at least green light - blue works great. That is, why you never could charge your watch dial with incandescent light, but any white LED will work great because their light usually contains a lot of blue light. Fun fact: though it is calles "phosphorescence" all those colors don't contain any Phosphor, that Phosphor isn't phosphorescent :p An error in early naming.