Optique TD2 : Interférences lumineuses.

A0
 b >>  a
a >> 
S1S2
L2M
(x, y)
A0S1S2
S1S2
M y
M(x, 0) M
δ(M) = a sin(α)tan(α) = x/f
x << f M
S1S2
A0x0x
L1
δ0(M)x0x f a
x x0f

S
L1
L2
S1S2S3
a L1
L2
f0
S M
ϕ1ϕ2ϕ3
S M S1S2S3λ0
δ12 S1
S2a x f x << f
s(S, t) = s0eiωt
M s0ω ϕ1ϕ2ϕ3
M
I(M) = I0(1 + cos(2π
λ0
ax
f0))2I0=s2
0/2