Jeulin 223 008 Mode D'emploi page 64

Ultrasounds
Moduson table
Ref :
223 008
 Record the measurement results in the table below:
The angles are given in algebraic notation relative to the graduation zero.
minimum
minimum
difference
maximum
minimum
difference
What is the measured variation for the angle θ from one maximum to the adjacent maximum
(and from one minimum to the adjacent minimum)? In what angular domain is this verified?
What is the number of the observed peaks and minima:
What can be said about the difference between the peaks and the minima and about their
alternation?
3.2 Step 3: Exploitation of the results
 Theoretical study of the interference phenomenon

The wavelength is λ.
At an arbitrary point M, the waves from the sources S
δ=d
What do you observe if the two waves arrive in phase at point M?
The relationship that renders this condition is:
What do you observe if the two waves arrive in opposition of phase at point M?
The relationship that renders this condition is:
ENGLISH
θ
θ
•
peaks
•
minima
The superposition model of the waves from the two synchronous sources is used.
-d .
2 1
and S exhibit a course difference
1 2
δ=
δ=
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