does gen crystal reflect rainbow under the light?

[Erict719]

As title

[sneed12]

you come up with the weirdest questions

[1680]

you come up with the weirdest questions

 

 

 

@Erict: I never noticed this...

[gran]

No not under the light

 

[Erict719]

Lol because I thought their crystal is very pure.

Mine always have rainbow showing around the edge

[Nanuq]

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."

[freddy333]

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.

[Erict719]

so the crystal is plastic???

[1680]

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.

[Erict719]

I am asking about sapphire . Like 16610 crystal.

Should they show rainbow??

[freddy333]

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

[Nanuq]

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.

[Erict719]

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

[gran]

rehaut?

[Erict719]

Yes

[preacher62]

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.