Understanding Modified Two-Slit Experiments Using Path Markers

Some modified two-slit interference experiments were carried out showing an apparent paradox in wave–particle duality. In a typical such experiment, the screen, where pattern is supposed to be formed, replaced by converging lens. The lens forms images of two slits at spatially separated detectors. It was claimed that each these detectors give information about which slit photon came from, even though they come from region interference. These generated lot debate. various refutations pointed controversial claims involved some questionable assumptions. However largely philosophical nature, and one may like substantiate those with arguments are testable, least principle. Here experiment theoretically analyzed introducing path markers orthogonal polarization states photon. Analyzing shows photons rise interference, reach particular detector, always both slits. This provides clarity understanding making use testable quantum correlations.