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On all of these questions you ask, have you ever gotten an answer that you accepted? My guess is no. I'll have just assume the answer is no since this thread is now on ignore.

//www.youtube.com/watch?v=xtZZClqwXwEQuoteVideo showing single slit diffraction of a laser as the slit width is adjusted. Suitable for A-Level Physics.Let's focus on a single point in the center of the bright pattern on the screen. When the slit is narrow, this spot becomes much dimmer compared to when the slit is wider, even though the ray of light can still go directly from the light source to that specific spot on the screen. It could mean that the opaque materials that the single slit apparatus is made of have blocked some of the light that initially would go to that central spot. Or the edges of the slit have deflected the ray of light hitting them to the central spot, and produce partially destructive interference with the direct ray of light to that spot. Or a combination of both. Is there a way to determine which case is the most correct interpretation?

Video showing single slit diffraction of a laser as the slit width is adjusted. Suitable for A-Level Physics.

I've just recorded a variation of needle diffraction. In this version, the "needle" model is elongated in the direction of light propagation. It can be done using a name card, with the thickness around a half millimeter. Interestingly, the width of central bright spot in the interference pattern it produced is the same as the side spots. Instead of twice as wide like in a normal needle diffraction or single slit experiment.

This video compares the result of diffraction and interference pattern from a deep single slit experiment and a thick single wire experiment. It explores the effects of depth or thickness of the aperture to the diffraction and interference pattern which is rarely discussed elsewhere.

In a single slit experiment, an alternating dark and bright pattern can be seen when light is imposed on a slit with a size corresponding to the wavelength of light. The only differences between a single slit and a double-slit experiment are the diffraction patterns and the intensity graphs.

What is Diffraction?The process of bending light around corners such that it spreads out and illuminates regions where a shadow is anticipated is known as diffraction of light. In general, because both occur concurrently, it is difficult to distinguish between diffraction and interference. The diffraction of light is what causes the silver line we see in the sky. A silver line appears in the sky as the sunlight penetrates or strikes the cloud.What Is Single Slit Diffraction?The curving of light waves around a tight turn of an obstacle or an opening is known as the diffraction of light.The single slit diffraction?s meaning is that an alternating dark and bright pattern can be seen when light is imposed on a slit with a size corresponding to the wavelength of light.When light strikes the gap, secondary wavelets form at each point, as per Huygens? rule.These wavelets start out in a phased manner and then disperse on all sides.Each one of them covers a specific path to reach any location on the screen.Due to the path difference, they reach diverse phases and may interact either constructively or destructively.Single Slit Diffraction Formula

There are many weaknesses in the explanation above,

The most obvious one that I suspected right away is from multiple slit experiment. The more numbers of slit produce thinner bright spots. When there are infinitely many slits involved like what's explained in many sources, the bright spots should be infinitely thin. But that's not what we observe.

What's your answer to my question below?"Is there a way to determine which case is the most correct interpretation?"

Quote from: hamdani yusuf on 29/01/2024 06:22:56The most obvious one that I suspected right away is from multiple slit experiment. The more numbers of slit produce thinner bright spots. When there are infinitely many slits involved like what's explained in many sources, the bright spots should be infinitely thin. But that's not what we observe.Really? When have observed the experiment with an infinite number of slits?

Quote from: hamdani yusuf on 15/12/2023 02:54:34What's your answer to my question below?"Is there a way to determine which case is the most correct interpretation?"Unfortunately there is no interpretation that you would accept, for some reason you never come to a conclusion, you just continue to ask the same question over and over ad nauseam.

If it has a finite thickness, it isn't an edge, so you need an infinite number of Huygens constructions to predict the outcome. Better to simply note that as n→∞ so the diffraction pattern becomes less intense and more diffuse than two classic single-ray plots.

I accept explanations that are not contradicted by experimental results. It's possible that more than one distinct explanations produce the same result for an experiment. But with more experiments some of them may start to fail.

Huygens? rule is commonly used to explain the diffraction-interference pattern produced by single slit experiment. It coincidentally matches with the standard setup. But more evidences are keep coming up contradicting the explanation using some variation of the experimental setup, e.g.- Horizontally tilted diffraction.- Vertically tilted diffraction.- Non-diffractive slit using total internal reflection as the obstacle.- Diffraction by polarizing obstacle.- Diffraction by thick wire.How many more evidence is required to convince us that we need a new explanation to replace Huygen's rule for explaining single slit experiment?

In this video, I describe the process of Fraunhofer diffraction (also known as far-field diffraction) in terms of the Fourier Transform and Fourier Optics. I go over the assumptions that underlie Fraunhoffer diffraction (both the paraxial approximation and the small-aperture approximation), and give the mathematical form that it takes.This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.

In this video, I go over one-dimensional single-slit Fraunhofer diffraction. I walk through the mathematics using the Fourier Transform to calculate the intensity at a screen a distance d away, as a function of the screen coordinates.