Museo
de
Física,
FCEyN,
UBA
Proyecto
Museo
del
Departamento
de
Física,
FCEyN,
UBA
Pieza
#
087
Información
Disponible
#
87
Denominación
identificatoria
Fosforoscopio
de
Bequerel
Función
Demostración
Principio
de
funcionamiento
Fenómeno
de
`after-glow`
Referencias
locales
Marcas
Época
1857
Referencias
bibliográficas
Referencias
en
Internet
http://www.abdn.ac.uk/~nph126/selected.php?id=31
Referencias
personales
Comentarios
Looking
like
some
mechanical
toy,
this
device
needs
no
instruction
to
tell
you
to
turn
the
handle
and
keek
through
the
window
at
the
top.
As
your
expectations
rise
with
the
pitch
of
the
clattering
gearwheels
and
you
peer
harder,
a
cloud
of
disappointment
will
surely
eclipse
your
efforts.
Nothing
at
all
can
be
seen
in
the
window.
The
Becquerel
phosphoroscope
is
not
a
toy
but
a
remarkable
piece
of
equipment
devised
in
1857
to
investigate
the
phenomenon
of
after-glow.
When
set
up
correctly
it
is
able
to
achieve
by
mechanical
means
what
today
would
require
a
bench
of
optical
and
electronic
equipment,
and
a
handsome
supportive
grant.
Phosphorescence
is
the
ability
of
a
material
to
give
out
light
of
one
colour
significantly
after
it
has
been
illuminated
by
light
of
a
more
energetic
colour.
It
is
the
basis
of
many
glow-in-the-dark
dyes.
A
related
phenomenon
was
at
the
heart
of
the
first
modern
laser,
though
of
course
Becquerel
did
not
forsee
this
development.
Our
own
phosphoroscope
is
built
to
the
pattern
of
the
French
model
(made
by
the
notable
Paris
instrument
maker
Duboscq)
but
bears
the
stamp
of
Alex
Spark,
a
local
instrument
manufacturer
whose
premises
were
well-known
in
Aberdeen
100
years
ago.
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correcciones
y
nuevos
datos
enviarlos
a
Guillermo
Mattei
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Mattei