Blue light from envelope
- Thread starter notb665
- Start date
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notb665 said:
Electric bill.
Most envelopes can contain static under the right conditions.
That is why Anti-static envelopes are manufactured for some delicate electronic components.
That is why Anti-static envelopes are manufactured for some delicate electronic components.
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B
breezer
its not static, its triboluminescence
Triboluminescence is the emission of light resulting from friction
generated by the vigorous crushing or tearing of certain substances.
Sometimes rapidly yanking a piece of Scotch tape off a roll can
produce a small amount of visible light, and the same mechanism causes
the well-known "sparking" effect of wintergreen candy when it is
crushed between the teeth. All these phenomena are much more
noticeable in a darkened room, of course.
Briefly, triboluminescence occurs when molecules are jammed together,
forcing some of the molecules' electrons out of their atomic fields.
The free electrons collide with nitrogen in the air, imparting energy
to the nitrogen molecules, which causes them to vibrate and emit
light. Most of the light emitted is in the ultraviolet range, but they
do emit a small amount of visible light as well, which is violet or
bluish in color since it is in the high end of the visible-light
spectrum.
The reason why some self-seal envelopes do this more than others is
that some adhesives have a greater tendency to absorb the ultraviolet
(short wavelength) light that is produced by the excited nitrogen;
they re-emit this as light in the visible spectrum, specifically
purplish-blue light.
Triboluminescence is the emission of light resulting from friction
generated by the vigorous crushing or tearing of certain substances.
Sometimes rapidly yanking a piece of Scotch tape off a roll can
produce a small amount of visible light, and the same mechanism causes
the well-known "sparking" effect of wintergreen candy when it is
crushed between the teeth. All these phenomena are much more
noticeable in a darkened room, of course.
Briefly, triboluminescence occurs when molecules are jammed together,
forcing some of the molecules' electrons out of their atomic fields.
The free electrons collide with nitrogen in the air, imparting energy
to the nitrogen molecules, which causes them to vibrate and emit
light. Most of the light emitted is in the ultraviolet range, but they
do emit a small amount of visible light as well, which is violet or
bluish in color since it is in the high end of the visible-light
spectrum.
The reason why some self-seal envelopes do this more than others is
that some adhesives have a greater tendency to absorb the ultraviolet
(short wavelength) light that is produced by the excited nitrogen;
they re-emit this as light in the visible spectrum, specifically
purplish-blue light.
Bl**dy Hell!
Applause all round.
Applause all round.
B
breezer
I never said it wasnt or was
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I've noticed this with self seal envelopes before now, but have been scared to mention it in case anyone burned me at the stake for being a witch...
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