Hackmanite fluorescence v. reflection - Blue LED (reflection)

FOV: 5" wide.

 

This experiment demonstrates the amount of visible (blue) light reflected or absorbed and then re-emitted at a lower wavelength (fluorescence) in a specimen of hackmanite from Afghanistan. The hackmanite is in a tenebrescent state which makes it purple. This color does not effect the results of this experiment but it does make the hackmanite easier to distinguish from the rest of the rock.

 

A small piece of aluminum foil was placed next to the hackmanite as an example of a "perfect" reflector. It does not fluoresce. Note: for the UVa picture, the foil was removed to prevent accidental exposure to eyes and the camera by the UVa light.

 

Contains:

Hackmanite (FL Orange >BL/UVa ...)

 

Shown under blue LED light.

 

Key:

WL = White light (halogen + LED)

FL = Fluoresces

PHOS = Phosphorescent

Blue = 450nm,

UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)

'>' = "stimulated by:", '!' = "bright", '~' = "dim"

 

Disulfide Based Fluorescence

22Nov2015

 

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Photostream best viewed in Lightbox mode (in the dark).

 

18 Watt Triple Output UV lamp from Polman Minerals - Way Too Cool UV lamps

Done