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Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by Retric on Wednesday October 07, 2020 @12:07PM (#24709593)
Mirrors flip things inside out not left to right. You see your images face not the back of the head. This confuses left to right as you’re referring to port and starboard, assuming your image isn’t inside out.
Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by noxer on Wednesday October 07, 2020 @12:19PM (#24709742)
Mirrors don't flip anything. They change direction of photons. Trow a ball on a wall at an angle it bounces of at the same angle there is no flipping. Write a word on a paper with fresh paint then press in on a wall then remove it. The word on the wall is exactly want you pressed on the wall it didn't flip the paint you did when you flipped the paper.
Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by Retric on Wednesday October 07, 2020 @12:26PM (#24709809)
Bouncing is flipping direction.

A light source moving away from you to a mirror is getting dimmer, but it’s reflection is getting brighter. That’s a measurable physical property that’s reversed. Similarly, a red or blue shifted object between the mirror has a reflection that’s revered in the other direction. However, when looking at an object behind you that doesn’t happen as the reflection shows the same side.

Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by noxer on Wednesday October 07, 2020 @02:48PM (#24711326)
>A light source moving away from you to a mirror is getting dimmer, but it’s reflection is getting brighter.

The distance to the light source grows if you move it away toward the mirror it gets dimmer. The the distance of the light in the reflection however gets shorter so it get brighter.

If the light is right next to you the distance is zero. The reflected light however traveled 2 times the distance to the mirror (dimmer). If you move the light to the mirror both "lights" are one mirror distance away so they have the same brightness (assuming a perfect mirror). There is no "physical property reversed" at all. You could remove the mirror and measure the light intensity twice the distance away instead. Then move the light to the middle where the mirror was and obviously the sensor would measure and increase while you see a decrees in brightness.

Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by Retric on Wednesday October 07, 2020 @03:19PM (#24711646)
This is going to seem really pedantic, but many properties of the photons are consistent with a path that reflects off of a mirror. However, it’s unclear if it actually takes that path.
Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by noxer on Wednesday October 07, 2020 @04:51PM (#24712569)
I have no clue what you want to says with this
Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by analog31 on Wednesday October 07, 2020 @01:46PM (#24710742)
Interestingly, optics design software models a flat mirror as a coordinate transformation. "All models are false, but some are useful."
Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by Grustaf on Wednesday October 07, 2020 @07:10PM (#24713897)
That model is both true and useful though.
Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by nendroid on Wednesday October 07, 2020 @01:05PM (#24710299)
You can't prove this at all. How do you know the photons don't pass through the mirror? What you are seeing are photons from the flipped alternate world on the other side of the mirror. Your reflection sees you and you see your reflection.

In a sense if you replace the mirror with a real reflected universe the same photons will hit your eyes and your perception of the reflection will be identical as if you are seeing an alternate world. That is what we perceive instinctually and we wouldn't be able to tell the difference. You literally cannot prove it, but that's besides the point.

When people refer to flipping in the reflection they are not referring to the physical phenomenon of reflection but they are referring to the interpreted equivalent meaning that if the reflection was replaced with an identical universe to our own how is this reflected universe transformed relative to ours? The answer is: Something flipped.

In this case what we are saying is that the z-axis flipped.

Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by noxer on Wednesday October 07, 2020 @02:56PM (#24711399)
Every surface is a mirror just a bad one. If your "theory" would be correct every surface emits light form some alternative universe but only if light form your universe hits it.
Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by nendroid on Wednesday October 07, 2020 @07:16PM (#24713956)
Read my full post.
Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by noxer on Friday October 09, 2020 @04:56PM (#24734352)
I did and I pointed out why your theory is garbage.

I didn't comment the last part because as its simply wrong. Nothing is flipped at no axis at all. If what you see in the mirror would be another universe then it would have to me MIRRORED to look like we see things in a mirror. Every row of atoms right-angled towards the mirror would have to have the exact opposite order. Would the other universe be flipped? No it would not. The wrong assumption is that your universe and the one you see in the mirror is identical. But it would have to be mirrored it can not be identical and also not flipped. No matter how you would flip the other universe it would never look like what you see in a mirror.

Just use 2 identical but non-simple objects place them next to each other for example 2 coins. No matter how you flip or rotate the coins it will never look like there is a mirror in between. You would need a mirrored coin for that.

Re:Why Do Mirrors Flip Things Horizontally but Not Verticall... by nendroid on Friday October 09, 2020 @08:34PM (#24735774)
No. Get yourself straight and reread my post.

The full post is saying that the interpretation of what you see is NO DIFFERENT from an alternate universe. I am not saying this is actually what's going on.

All reflections on all surfaces can be interpreted this way.

The point of the example is to say that the language people use to refer to reflections is to refer to this alternate higher level interpretation and is still valid. Only the most pedantic person will say "nothing" has flipped and call it just bouncing photons.

> If what you see in the mirror would be another universe then it would have to me MIRRORED to look like we see things in a mirror.

This is exactly what I'm saying nothing precludes the alternate universe to be MIRRORED. The alternate universe is a mirrored universe, Get it?

>The wrong assumption is that your universe and the one you see in the mirror is identical.

This is your assumption. I never said this. I said ALTERNATE universe. <--- read the word ALTERNATE. I'm assuming here that you might be delusional and seeing the word IDENTICAL instead of alternate.

>No matter how you would flip the other universe it would never look like what you see in a mirror.

Again if the atoms in this universe and flip them across the Z-axis the light bouncing off those atoms would produce exactly what you see in the mirror.

>Just use 2 identical but non-simple objects place them next to each other for example 2 coins. No matter how you flip or rotate the coins it will never look like there is a mirror in between. You would need a mirrored coin for that.

When I say a z-axis flip I mean inside out. Imagine holding a glove, then turning that glove inside out. That is a z-axis flip. Your coin analogy is completely off.

>I did and I pointed out why your theory is garbage.

I never even made a theory I just used the alternate universe thing as an example of the vernacular people use... people refer to the reflection as a real object and not as bounced photons and this interpretation is valid because it can't be proven otherwise. You just didn't get it. Hopefully you reread my post and realized that it is not my "theory" that's garbage but your brain.