<s>
Landau	B-Algorithm
–	I-Algorithm
Placzek	I-Algorithm
ratio	I-Algorithm
is	O
a	O
ratio	O
of	O
the	O
integrated	O
intensity	O
of	O
Rayleigh	O
scattering	O
to	O
the	O
combined	O
integrated	O
intensity	O
of	O
Brillouin	B-Algorithm
scattering	I-Algorithm
of	O
a	O
triplet	O
frequency	O
spectrum	O
of	O
light	O
scattered	O
by	O
homogenous	O
liquids	O
or	O
gases	O
.	O
</s>
<s>
The	O
triplet	O
consists	O
of	O
two	O
frequency	O
shifted	O
Brillouin	B-Algorithm
scattering	I-Algorithm
and	O
a	O
central	O
unshifted	O
Rayleigh	O
scattering	O
line	O
split	O
.	O
</s>
<s>
The	O
Landau	O
–	O
Placzek	O
formula	O
provides	O
an	O
approximate	O
theoretical	O
prediction	O
for	O
the	O
Landau	B-Algorithm
–	I-Algorithm
Placzek	I-Algorithm
ratio	I-Algorithm
,	O
</s>
