Final answer:
The Coefficient of Coincidence is a term used in the context of interference to calculate the amplitude of the interference fringe.
Step-by-step explanation:
The Coefficient of Coincidence is a term used in the context of interference. It is used to calculate the amplitude of the interference fringe in certain scenarios. The formula for the Coefficient of Coincidence is A² = A₁² + A₂² + 2A1A2 cosd, where A₁ and A₂ are the amplitudes of the two coherent waves, and cosd is the phase difference between them. This equation can also be applied to Young's double slit experiment, where A₁ and A₂ are equal. The amplitude of the interference fringe can then be calculated using the formula A² = 2A1² (1+ cos).