Light from two closely-spaced stars cannot produce a steady interference pattern due to
A)incoherence.
B)the inherent instability of the atmosphere.
C)their different radial distances.
D)their non-point like natures.
E)closely spaced stars not producing interference patterns.

Question

Quizplus · Accepted Answer

Incoherence means that the light waves from the two stars are not able to maintain a constant phase relationship needed to produce a steady interference pattern. Incoherence can occur when sources are too far apart or too different in their light source.

Light from Two Closely-Spaced Stars Cannot Produce a Steady Interference