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Optics and Photonics Journal

Interference Experiment with a Transparent Mask Rejects Wave Models of Light

John Hodge

Published Jan 1, 2019• 5 citations
Publisher

Abstract

Young’s double-slit experiment shows characteristics of light that are modeled as indicating a wave nature of light. Other experiments suggest a particle model of light. An experiment is performed with the Fraunhofer pattern from a first mask impinging on a transparent second mask with a slit. The screen pattern is an interference pattern such as produced in Young’s Experiment. An opaque strip between the first and second mask blocks the light of the center maxima from the first mask. The screen interference fringes remained. Moving the glass mask so the slit is removed from light shows the necessity of a slit in the second mask. This suggests a Newtonian type of light model. This experiment rejects the wave models of light.

DOI
10.4236/opj.2019.96008

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The double slit experiment was first conceived of by the English physician-physicist Thomas Young in 1801. It was the first demonstrative proof that light possesses a wave nature. In this experiment, light is made to pass through two very narrow slits that are spaced closely apart and a screen placed on the other side captures a pattern of alternating bright and dark stripes called fringes, formed as a result of the interference of ripples of light emanating from either slit. The relative positions and intensities of the fringes on the screen can be calculated by employing two assumptions that help simplify the geometry of the slit-screen arrangement. Firstly, the screen to slit distance is taken to be larger than the inter-slit distance (far field limit) and secondly, the inter-slit distance is taken to be larger than the wavelength of light. This conventional approach can account for the positions and intensities of the fringes located in the central portion of the screen with a fair degree of precision. It however, fails to account for those fringes located in the peripheral portions of the screen and also, is not applicable to the case wherein the screen to slit distance is made comparable to the inter-slit distance (near field limit). In this paper, the original analysis of Young’s Experiment is reformulated using an analytically derived hyperbola equation, which is formed from the locus of the points of intersections of two uniformly expanding circular wavefronts of light that emanate from either slit source. Additionally, the shape of the screen used to capture the interference pattern is varied (linear, semicircular, semielliptical) and the relative positions of the fringes is calculated for each case. This new approach bears the distinctive advantage that it is applicable in both the far field and the near field scenarios, and since no assumptions are made beyond the Huygens-Fresnel principle, it is therefore, a much more generalized approach. For these reasons, the author suggests that the new analysis ought to be introduced into the Wave Optics chapter of the undergraduate Physics curriculum.

American Journal of Optics and Photonics•Jan 1, 2019•15 citations
Young’s double-slit experiment shows characteristics of light that are modeled as indicating a wave nature of light. Other experiments suggest a particle model of light. An experiment is performed with the Fraunhofer pattern from a first mask impinging on a transparent second mask with a slit. The screen pattern is an interference pattern such as produced in Young’s Experiment. An opaque strip between the first and second mask blocks the light of the center maxima from the first mask. The screen interference fringes remained. Moving the glass mask so the slit is removed from light shows the necessity of a slit in the second mask. This suggests a Newtonian type of light model. This experiment rejects the wave models of light.
Young's interference and Hodge's diffraction of light experiments show characteristics of light that have defied modeling except for the Scalar Theory of Everything (STOE) model. The Hodge Experiment is the Fraunhofer pattern from a first mask with a slit impinges on a second mask with a slit(s). The Hodge Experiment is extended to model a diffraction pattern on a transparent second mask with a slit. The screen pattern is an interference pattern such as produced with two slits in Young's Experiment. A nail is placed between the first and second mask to block the light of the center maxima. The interference fringes remained in the secondary peaks. This observation rejects wave models of light that requires light through the second slit. The STOE model successfully modeled the observed pattern.
Young’s double slit experiments have been interpretated by the optical wave theory. The observation of the wave behavior of the light near the detecting screen has long history. Recently we have shown the particle nature of the light near the detecting screen (the far field) in the wave experiments. In this article, we place two shields near the double slit to explore the nature of light. The experiment shows that, near the double slit, the light behaves as photons, propagates along the straight-line trajectories. The portion of the light, which directly passing through the channel formed by Shield-1 and Shield-2, produces the interference pattern at the central portion of the pattern. While the portions of the light, which are reflected multi-times by Shield-1 and Shield-2 respectively, produce the left pattern and the right pattern at the left-side and the right-side of the interference pattern respectively. The left pattern and the right pattern are not interference pattern. This novel double slit experiments provide comprehensive phenomena for further developing the theory to interpret the experiments.
Young’s double slit experiments have been interpretated by the optical wave theory. The observation of the wave behavior of the light near the detecting screen has long history. Recently we have shown the particle nature of the light near the detecting screen (the far field) in the wave experiments. In this article, we place two shields near the double slit to explore the nature of light. The experiment shows that, near the double slit, the light behaves as photons, propagates along the straight-line trajectories. The portion of the light, which directly passing through the channel formed by Shield-1 and Shield-2, produces the interference pattern at the central portion of the pattern. While the portions of the light, which are reflected multi-times by Shield-1 and Shield-2 respectively, produce the left pattern and the right pattern at the left-side and the right-side of the interference pattern respectively. The left pattern and the right pattern are not interference pattern. This novel double slit experiments provide comprehensive phenomena for further developing the theory to interpret the experiments.
The double slit experiment was first conceived of by the English physician-physicist Thomas Young in 1801. It was the first demonstrative proof that light possesses a wave nature. In this experiment, light is made to pass through two very narrow slits that are spaced closely apart and a screen placed on the other side captures a pattern of alternating bright and dark stripes called fringes, formed as a result of the interference of ripples of light emanating from either slit. The relative positions and intensities of the fringes on the screen can be calculated by employing two assumptions that help simplify the geometry of the slit-screen arrangement. Firstly, the screen to slit distance is taken to be larger than the inter-slit distance (far field limit) and secondly, the inter-slit distance is taken to be larger than the wavelength of light. This conventional approach can account for the positions and intensities of the fringes located in the central portion of the screen with a fair degree of precision. It however, fails to account for those fringes located in the peripheral portions of the screen and also, is not applicable to the case wherein the screen to slit distance is made comparable to the inter-slit distance (near field limit). In this paper, the original analysis of Young’s Experiment is reformulated using an analytically derived hyperbola equation, which is formed from the locus of the points of intersections of two uniformly expanding circular wavefronts of light that emanate from either slit source. Additionally, the shape of the screen used to capture the interference pattern is varied (linear, semicircular, semielliptical) and the relative positions of the fringes is calculated for each case. This new approach bears the distinctive advantage that it is applicable in both the far field and the near field scenarios, and since no assumptions are made beyond the Huygens-Fresnel principle, it is therefore, a much more generalized approach. For these reasons, the author suggests that the new analysis ought to be introduced into the Wave Optics chapter of the undergraduate Physics curriculum.