How to Calculate Optical path difference?
Optical path difference calculator uses Optical path difference=(Refractive Index-1)*Distance between slits and screen/Distance between two coherent sources to calculate the Optical path difference, Optical path difference or optical distance is the product of the geometric length of the path followed by light through a given system, and the refractive index of the medium through which it propagates. . Optical path difference and is denoted by Δ symbol.
How to calculate Optical path difference using this online calculator? To use this online calculator for Optical path difference, enter Refractive Index (RI), Distance between two coherent sources (d) and Distance between slits and screen (D) and hit the calculate button. Here is how the Optical path difference calculation can be explained with given input values -> 0.666 = (1.333-1)*0.2/0.1.