Fireworks:
The
Art
of
Pyrotechnics Fireworks,
also
known
as
pyrotechnics,
have
been
around
for
centuries.
They
are
used
to
celebrate
significant
events
and
occasions
around
the
world.
From
New
Year's
Eve
to
Independence
Day,
fireworks
entertain
and
delight
millions
of
people. Each
firework
is
unique
and
has
a
different
effect
when
ignited.
There
are
rockets,
fountains,
wheels,
and
cakes,
to
name
a
few.
Each
firework
is
composed
of
a
different
combination
of
chemicals
and
arranged
in
a
specific
way
to
create
the
desired
effect. The
colors
seen
in
fireworks
are
a
result
of
various
metallic
salts
added
to
the
chemical
mixture.
For
example,
copper
produces
a
blue
color,
barium
yields
green,
and
strontium
creates
a
red
hue.
Each
firework
contains
several
layers
of
these
chemicals
in
different
compositions
to
produce
the
desired
color
and
effect. Fireworks
have
a
long
history.
They
were
first
invented
in
China
over
1,000
years
ago.
It
was
during
the
Tang
Dynasty
that
Chinese
alchemists
discovered
how
to
mix
sulfur,
charcoal,
and
saltpeter
to
create
a
substance
that
burned
with
a
bright
flame.
These
combinations
were
used
for
military
purposes
and
were
eventually
developed
into
the
firework
display
we
know
today. The
art
of
fireworks
has
evolved
over
time,
becoming
more
sophisticated
and
ela〔阅读更多 12星座查询表常识请关注 :木兰星座查询网,WWw.imUlaN.Cc」borate.
Advancements
in
technology
and
chemistry
have
allowed
for
more
innovative
designs
and
complex
displays. In
recent
years,
environmental
concerns
have
led
to
changes
in
the
composition
of
fireworks.
Some
countries
have
phased
out
the
use
of
certain
chemicals
and
replaced
them
with
more
environmentally
friendly
alternatives. While
the
use
of
fireworks
may
be
controversial
in
certain
areas
due
to
the
potential
hazards
and
noise
pollution,
it
is
undeniable
that
fireworks
displays
are
an
essential
part
of
many
cultural
celebrations.
Whether
it
is
the
Fourth
of
July
in
the
United
States
or
the
Diwali
festival
in
India,
fireworks
entertain
and
bring
people
together
in
a
breathtaking
display
of
light
and
sound.