Hachem

First, diffraction should not be a problem since we are talking about a 0.25mm aperture, with no lens. The different wavelengths are measured in nanom...

/uploads/resized/files/dc/7tj4yharzz07gakc.png This is a sliver taken out of the first picture. Personally, it reminds of the images made of light goi...

It should be possible, with better equipment, to shine a laser light exactly through the center of a pinhole, something I failed at miserably. Theoret...

Light is supposed to travel at 300.000 km/s. How could there be a difference of less than 1 second between a picture where the laser spot is visible, ...

/uploads/resized/files/7q/cy3fwfg4h9jzr1pu.jpg /uploads/resized/files/xi/frjxikkhw4hxpgvt.jpg Those are two pictures taken with a pinhole lens, attach...

Where is my image now (3) Instead of a monochromatic ray box, try using, as I did, two red and one green laser pens. You will notice that the green be...

nothing wrong with that.

I am afraid I do not share such a romantic view of ancient knowledge.

I think you should remember that we are talking about science, and not experience. The discussion which of the two is closer to reality sounds like a ...

I am a great believer in Science, and at the same time the most skeptic of all. https://philpapers.org/post/17142 edit: maybe more to the point, I fou...

Why does ray tracing work (even if it is wrong?) Imagine a super ray box, one, just as big, with not 5 but 500, or even 5000 beams? How would all thos...

Thank you. But I was just about done. This was a side-street I was walking, with no real definite end to it. I have, in another forum, spent as much t...

Please read the previous posts. You barge in and expect us to start all over again. That is not reasonable.

I personally have no problem with the idea of a universe expanding. After all, it is as reassuring or scary as the idea of a finite world. A little li...

assume further my dear sir.

Time, even as objective phenomenon, is never neutral. When you make biological processes run at two times their normal speed, you are not effectuating...

I already know the argument, and it is the most ridiculous thing I have ever heard. Ask biologists.

I don't, Einstein does, and before him his teacher that invented it.

Because Time is not an objective phenomenon? In this I completely agree with Bergson.

I won't speak for Rich, but I find the concept of space-time a metaphysical monstrosity.

Then you are expressing one of the contradictions Rich was warning about.

is that a yes?

How about space-time? Should it be elevated to an ontology?

I wouldn't have any problems with that. Only, as Rich indicated, RT and QM come with ontological claims and so does contemporary science. This thread ...

To sum up the whole discussion. We have no idea whether the universe is expanding or not. Some say it does, some say it does not.

I can confirm this attitude in Physics forums. They are very good at regurgitating textbook knowledge and abhor critical questions. I have even been b...

@MikeL anyone. I am interested, in this case at least, in direct feedback on the argumentation, and much less on a general discussion, which I also co...

Okay. Any feedback on the validity of my argumentation concerning muons?

I would like to present something that I wrote some time ago, when I was researching Relativity and Quantum Theory. I would be interested in your reac...

The Aperture Problem (2) The video clip mentioned earlier is a perfect illustration of the AP. Imagine putting a diaphragm right after the convex lens...

I think you certainly should keep digging in this direction. My inclinations are different if certainly not opposed to yours. Right now I am still won...

You have taken a very bad example for predictions. There are no predictions in this case, only conjectures. Cosmology is metaphysics with mathematical...

thank you :)

I couldn't find this code. So I have to use quote or @. Where is this broken arrow?

thank you

Where is my image now? (2) Instead of beams, imagine that the ray box was housing five colored windows whose reflections did not reach beyond a few ce...

@T Clark I am too old to interview for a job I do not want. My qualifications are my posts and comments. If you need references before you can respond...

Where is my image now? Imagine you are using a ray box like this gentleman , with 5 beams you pass through a converging lens. Where do you think an im...

@Rich I do not share your enthusiasm for Bergson, even if I do feel much sympathy for his ideas. Einstein has opened the way of thinking about space i...

@ T Clark why are you so hostile? If you think I am not credible, just ignore me. edit: let us not hijack this thread.

Your suspicion is shared by many. I find it reassuring that not any objection to the consensus is blindly accepted. I understand the need for Science ...

Why would I think that? I prefer to think that great minds meet, don't you?

Let me first state that I have of course no way of knowing whether the universe is really expanding or not. As it has been noted, the sole argument in...

I was considering creating such a thread myself. It is not necessary anymore. https://thephilosophyforum.com/discussion/comment/104721

I will take it as meaning that you have no further arguments to present except the expectation that everybody should accept the rules of Optics as the...

I would like to present you with another problem related to the Aperture Problem. You give in your description of image formation in a camera obscura,...

The second half of the quote is even more interesting, and concerns what I have called the Aperture problem, and which you have so conveniently ignore...

Candle Light Here is an experiment I wish I could do myself, but I am afraid my apartment is not big enough. Choose a large closed space with no windo...

I agree with this description of the way the amount of light affects visibility. It seems reasonable also to me to assume that a larger aperture will ...

Tell it to the military of all nuclear (super) powers that are counting on detecting a hostile missile enough time in advance to react before they are...