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sadac x − talRis gavrcelebis mimarTulebaa,<br />
v - gavrcelebis siCqare<br />
talRuri gantolebis amoxsnaa:<br />
sadac k - talRuri veqtoria,<br />
α − rxevis sawyisi faza<br />
ξ ( r , t)<br />
= Acos(<br />
ωt<br />
− kr<br />
+ α)<br />
4.9. talRebis interferencia<br />
koherentuli talRebi erTnairi sixSiris talRebia, romelTa<br />
fazaTa sxvaoba drois mixedviT mudmivia ( Δϕ = const)<br />
koherentuli talRebis zeddebas interferencia ewodeba.<br />
interferenciis Sedegad rxevebi sivrcis zogierT wertilebSi<br />
Zlierdebian, zogierTSi ki _ asusteben erTmaneTs.<br />
ori erTnairi sixSiris da amplitudis Semxvedri sinusoidaluri<br />
talRebis zeddebis Sedegs mdgari talRa ewodeba (nax. 36)<br />
mdgari talRis gantolebaa<br />
amplituda<br />
burcobebi<br />
kvanZebi<br />
nax. 36.<br />
⎛ x ⎞<br />
ξ = ⎜2<br />
Acos 2π<br />
⎟ ⋅ cosωt<br />
⎝ λ ⎠<br />
x<br />
Amd = 2 Acos<br />
2π<br />
= 2Acos<br />
kx<br />
λ<br />
wertilebisTvis, romlebSic kx = 0, π... Ak<br />
= 0 − warmoadgenen mdgari<br />
talRis kvanZebs, xolo wertilebisaTvis, romlebSic kx = π ,<br />
2<br />
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