In a Young's double slit experiment, what is the ratio of the intensity at a point where the electric fields are out of phase by 30° to the central intensity.
A)0.93
B)1.9
C)2.1
D)0.47
E)0.75

Question

Quizplus · Accepted Answer

The intensity at a point in a double slit experiment is given by I = I₀ cos²(Δϕ/2), where Δϕ is the phase difference. For Δϕ = 30°, cos²(15°) = 0.933, so the ratio is approximately 0.93.

In a Young's Double Slit Experiment, What Is the Ratio