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vlna

Vlna is a noun used in Czech and Slovak that means a wave or surge. In everyday language it can refer to physical waves such as water or sound waves, as well as to broader surges of activity, trends, or groups of people (for example a wave of refugees or a fashion wave). The term is also used in technical contexts to describe electromagnetic and other propagating disturbances.

In physics, a wave is a disturbance that transfers energy through a medium or through space without

Key phenomena associated with waves include interference, diffraction, reflection, and refraction. The speed of a wave

See also: wave (physics); electromagnetic wave.

the
net
transport
of
matter.
Waves
are
characterized
by
properties
such
as
wavelength,
frequency,
amplitude,
and
speed.
They
can
be
classified
as
mechanical
waves,
which
require
a
medium
to
propagate
(such
as
sound
in
air
or
waves
on
water),
and
electromagnetic
waves,
which
can
travel
through
vacuum
(such
as
visible
light,
radio
waves,
and
X-rays).
Electromagnetic
waves
travel
at
the
speed
of
light
in
a
vacuum
and
can
be
described
by
their
frequency
or
wavelength.
and
its
behavior
depend
on
the
medium
for
mechanical
waves
and
on
the
electromagnetic
properties
of
the
medium
for
EM
waves.
In
many
Slavic
languages,
cognate
terms
exist
(for
example
volnа
in
Russian),
but
Czech
and
Slovak
use
vlna
as
the
standard
word
for
a
wave,
with
related
expressions
such
as
vlnová
délka
(wavelength)
and
vlnení
(oscillation
or
wave
motion).