Coherence as Visible Phase

Coherent Fraction Scales Signal

visible counts are checked

The visible phase signal is the ideal count times the coherent fraction. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Three fourths coherence scales the visible count

The ideal visible count is 40. Multiplying by 3/4 gives 30.

Nvisible=40⋅34=30N_{\text{visible}}=40\cdot\frac{3}{4}=30
Scaled visible signalThe visible count is recomputed.3/4coherent1/4dephasedvisible fringe

One half coherence gives a smaller visible count

With coherent fraction 1/2, the same ideal count 40 gives 20 visible counts.

Nvisible=40⋅12=20N_{\text{visible}}=40\cdot\frac{1}{2}=20
Contrast visible signalThe helper enforces integer visible counts.1/2coherent1/2dephasedvisible fringe