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I just got an even stronger evidence that diffracted light is produced by the edges of the obstacle, instead of the space between those edges. The experiment involves linear polarization.
Linear polarization is easier to understand using microwave frequency since the physical shape of the polarizer can be observed using naked eye. Quote from: hamdani yusuf on 23/07/2021 07:11:06//www.youtube.com/watch?v=TWu4U-ngMjkI’ve been teaching microwave polarisation wrong! - A Level PhysicsQuoteSo it turns out the way I've been teaching microwave polarisation is wrong!! Well, it's not so much wrong, it's the fact that the 'picket fence' analogy for polarisation isn't what it first seems. Where the picket fence only allows vertically polarised light through, a corresponding polarising filter only allows horizontally polarised light through! Watch this video for more explanation.
//www.youtube.com/watch?v=TWu4U-ngMjkI’ve been teaching microwave polarisation wrong! - A Level PhysicsQuoteSo it turns out the way I've been teaching microwave polarisation is wrong!! Well, it's not so much wrong, it's the fact that the 'picket fence' analogy for polarisation isn't what it first seems. Where the picket fence only allows vertically polarised light through, a corresponding polarising filter only allows horizontally polarised light through! Watch this video for more explanation.
So it turns out the way I've been teaching microwave polarisation is wrong!! Well, it's not so much wrong, it's the fact that the 'picket fence' analogy for polarisation isn't what it first seems. Where the picket fence only allows vertically polarised light through, a corresponding polarising filter only allows horizontally polarised light through! Watch this video for more explanation.
I've finished editing a new video on horizontally tilted diffraction. The first part is just fixing my old clips, while the last part contains new material. I'll share it here when I finished uploading it to my Youtube channel.Many sources say that diffraction-interference pattern in a single slit experiment require the slit to be narrow, and comparable to the wavelength of the light wave. The word comparable in this context is not well defined.Some of them also mention that the edges of the slit must be sharp.My experiments will show that they are not necessarily true.
I've also finished editing a short video showing the occurrence of half interference pattern. The laser beam seemingly only interact with a single edge of the obstructing object.
It's a bit surprising.
Quote from: hamdani yusuf on 11/01/2023 07:30:09It's a bit surprising.To whom?
The Real Double Slit Experiment.This video was edited 30-12-2022. I removed everything but the experimental parts of the original video. The reason for this is that I was no longer behind the way I explained the experiments, especially the quantum aspects. What I will do i upload the original video for reference as unlisted and place the reference to it here. In the video I show you how you can use a microscope to visualize theEM- wave propagation after light has passed the slits.
My previous experiments of single edge diffraction using various materials didn't show any interference pattern. They include glass, acrylic, plastics, wood, paper, graphite, rubber, aluminum, carbon steel, stainless steel, copper, and some others.
Quote from: hamdani yusuf on 12/01/2023 02:38:28My previous experiments of single edge diffraction using various materials didn't show any interference pattern. They include glass, acrylic, plastics, wood, paper, graphite, rubber, aluminum, carbon steel, stainless steel, copper, and some others.Was the rest of the experimental setup identical?
Quote from: Bored chemist on 12/01/2023 08:38:54Quote from: hamdani yusuf on 12/01/2023 02:38:28My previous experiments of single edge diffraction using various materials didn't show any interference pattern. They include glass, acrylic, plastics, wood, paper, graphite, rubber, aluminum, carbon steel, stainless steel, copper, and some others.Was the rest of the experimental setup identical?Some of them were, but some were not. The shapes of their edges were arbitrary, depending on the objects that I could randomly find. But they can be classified into two general category : those with sharp edge and those with blunt edge, just like my experiments with the galvanized bent plate.
Do you understand why we don't think this is surprising?
So, you did different things, and got different results.You think this is surprising.
Some of them were,
It means that my previous experiments with the same setups as this one (the only difference is the material of the obstacle), shown no interference pattern in the shadow region of the obstacle.
Quote from: hamdani yusuf on 13/01/2023 13:41:27It means that my previous experiments with the same setups as this one (the only difference is the material of the obstacle), shown no interference pattern in the shadow region of the obstacle.How carefully did you look?How big and how bright would you expect the pattern to be?
At 1: 27 you say it's not clear if you have a pattern.I think you need a better experimental setup.Do you have a spatial filter?