Erict719 Posted August 13, 2013 Report Share Posted August 13, 2013 As title Link to comment Share on other sites More sharing options...
sneed12 Posted August 13, 2013 Report Share Posted August 13, 2013 you come up with the weirdest questions Link to comment Share on other sites More sharing options...
1680 Posted August 13, 2013 Report Share Posted August 13, 2013 you come up with the weirdest questions @Erict: I never noticed this... Link to comment Share on other sites More sharing options...
gran Posted August 13, 2013 Report Share Posted August 13, 2013 No not under the light Link to comment Share on other sites More sharing options...
Erict719 Posted August 13, 2013 Author Report Share Posted August 13, 2013 Lol because I thought their crystal is very pure. Mine always have rainbow showing around the edge Link to comment Share on other sites More sharing options...
Nanuq Posted August 13, 2013 Report Share Posted August 13, 2013 Different types of "plastic" have different indexes of refraction. The higher the index (and arguably the higher the quality) the more the refraction. So a high quality/index "plastic" will show more "rainbows" due to refraction than a lower quality/index "plastic." Link to comment Share on other sites More sharing options...
freddy333 Posted August 13, 2013 Report Share Posted August 13, 2013 As Nanuq said If you have a gen & aftermarket xtal of the same type under the same light, the gen should sparkle more. But basing authentication on light refraction is not a reliable path to follow. Link to comment Share on other sites More sharing options...
Erict719 Posted August 13, 2013 Author Report Share Posted August 13, 2013 so the crystal is plastic??? Link to comment Share on other sites More sharing options...
1680 Posted August 13, 2013 Report Share Posted August 13, 2013 You often ask about sapphire watches, so assumed you ask for a sapphire crystal? If you meant a plexi then yes they show rainbows like Nanuq and freddy said. Link to comment Share on other sites More sharing options...
Erict719 Posted August 13, 2013 Author Report Share Posted August 13, 2013 I am asking about sapphire . Like 16610 crystal. Should they show rainbow?? Link to comment Share on other sites More sharing options...
freddy333 Posted August 13, 2013 Report Share Posted August 13, 2013 Only if it has an AR coating (the AR refracts the light). The cyclops on my TT GMTIIC has AR & it is the only part where the light refraction creates the rainbow effect Link to comment Share on other sites More sharing options...
Nanuq Posted August 13, 2013 Report Share Posted August 13, 2013 It gets even weirder than this. It's at the light boundaries where refraction occurs. So air/glass refracts, then again on the other side where the glass/air interface is. If you had two layers of glass you'd have refraction as glass/air/glass/air (out the back side). There are also minor internal refractions from the "inside" face of the glass/air boundary back into the glass. You can get some crazy moire' patterns that way. Try looking at your crystal under a polarizing filter. It's better than Andy Warhol and root beer. Link to comment Share on other sites More sharing options...
Erict719 Posted August 14, 2013 Author Report Share Posted August 14, 2013 Mine is not ar. And yes the rainbow happen inside the crystal and only at the where the crystal and the inner engraving part is Link to comment Share on other sites More sharing options...
gran Posted August 14, 2013 Report Share Posted August 14, 2013 rehaut? Link to comment Share on other sites More sharing options...
Erict719 Posted August 14, 2013 Author Report Share Posted August 14, 2013 Yes Link to comment Share on other sites More sharing options...
preacher62 Posted August 17, 2013 Report Share Posted August 17, 2013 Any glass can break up the light, especially if it has angles at the 45, and the light hits it just right. You don't need to get a gen crystal for that. I don't think that even Rolex governs rainbows...LOL. Link to comment Share on other sites More sharing options...
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