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Author Topic: Can someone explain this visual or lens phenomena?  (Read 62929 times)

Phil Indeblanc

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Re: Can someone explain this visual or lens phenomina?
« Reply #100 on: November 24, 2016, 02:32:24 am »

Ray, it sounds like you'd have a easy time explaining the first part of this video. For some reason the math doesn't add up.
I know you have lots of info to counter 20 or so minutes in.

Pardon the title and his assumptions.
https://youtu.be/zGc7Xd6HP54
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Farmer

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Re: Can someone explain this visual or lens phenomina?
« Reply #101 on: November 24, 2016, 03:20:39 am »

No. We wouldn't suffer at all. Death would be instantaneous. An instant acceleration of our surroundings, equivalent to an increase in velocity of 1,600 km per hour, or equivalent to 96,000 km per hour if the change in momentum were introduced in one second (which is much longer than an instant), would be sure to kill us.

However if the process doesn't involve any change in momentum, on departure or on arrival, then we wouldn't be aware of any change in velocity.

A person's experience of movement is always an experience in relation to the movement of things in his immediate surroundings, that are within range of his physical senses. Whatever the part of the planet we are situated, and whatever the rotational speed of the particular section of the earth's surface we are standing on, we cannot be aware of the velocity of that section of the earth we are standing on, because we are also moving at the same speed as the surface we are standing on.

If it were possible to teleport someone instantaneously from the pole to the equator, without any change in momentum, (which of course is only possible in science fiction films like Star Trek), I can't see any reason why we would experience a change in the velocity of our new location, unless a change in momentum were suddenly introduced on arrival.

This is all getting very fanciful.  ;D

p=mv

Sci-fi like Star Trek refers to inertial dampers and the like, something to deal with changes in momentum such that it doesn't squish or stretch poor humans into destruction (and spaceships, for that matter).

In our current reality, we can't do that, and so movement by plane from pole to equator adjusts our rotational velocity (as well as the linear velocity due to the movement of the aircraft) in increments which are easily handled.  So the premise of the video is easily dismissed.

So we have two options.  Either our velocity matches the destination from an inertial frame of reference (in which case our velocity relative to the local frame of reference at destination is zero), or our velocity matches the departure from an inertial frame of reference (in which case our velocity relative to the local frame of reference at destination is significantly high as per your numbers).

Assuming a match to the destination local frame of reference: Since our mass stays pretty much the same (ignoring normal organic variations at various times...) if our velocity changes (as it must do between departure and destination compared to an inertial frame of reference) then our momentum must also change.  It doesn't matter what our perception of our environs is - only what it is in relation to an inertial frame of reference.  Since our momentum increases (because our velocity increases) we must be subject to a force.  F=ma.  Our mass is unchanged, so as you note our change in velocity requires a massive acceleration to avoid having a relative velocity to the physical frame of reference, and we would die.

Assuming a match to the departure local frame of reference: As above, except no change in momentum and therefore no change in velocity and therefore no match in velocity to the local destination frame of reference, which means the world around us would be moving more than 1,000km/h compared to us (although to local observers already matched to that local frame of reference's velocity, it would appear that we were moving at that velocity).  As soon as we hit something, we'd die.

Yes, totally fanciful, much like the flat Earther's hypothesis.
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Phil Brown

Jeremy Roussak

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Re: Can someone explain this visual or lens phenomina?
« Reply #102 on: November 24, 2016, 04:03:33 am »

You may not be nerdy enough.  The resource you are looking for comes via Douglas Adams and the Hitchhiker's Guide to the Galaxy (an ever expanding trilogy totalling 5 books).

Not expanding any more,  sadly: Adams died in 2001.

Jeremy
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Farmer

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Re: Can someone explain this visual or lens phenomina?
« Reply #103 on: November 24, 2016, 04:12:44 am »

Not expanding any more,  sadly: Adams died in 2001.

Yup, but that's how Adams described the series once So Long, and Thanks for All the Fish came out, so I still use the phrase :-)
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Phil Brown

Zorki5

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Re: Can someone explain this visual or lens phenomina?
« Reply #104 on: November 24, 2016, 09:20:42 am »

Yup, but that's how Adams described the series once So Long, and Thanks for All the Fish came out, so I still use the phrase :-)

IIRC, my copy of The Restaurant at the End of the Universe had "Volume two of the trilogy of five" on its cover. Adams was a true Master of the word, so what can you do... These phrases just stick.
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Bart_van_der_Wolf

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Re: Can someone explain this visual or lens phenomina?
« Reply #105 on: November 24, 2016, 09:53:54 am »

IIRC, my copy of The Restaurant at the End of the Universe had "Volume two of the trilogy of five" on its cover. Adams was a true Master of the word, so what can you do... These phrases just stick.

"Don't Panic"

Although I do question the mental sanity of the Flat-earthers, assuming they even believe themselves.

The recent video that Phil pointed at, mentioned as proof for the earth being flat that the Earth is stationary, and the sun only vanishes behind the horizon during sunset, because it moves further away ...

I rest my case. Enough time wasted.

Cheers,
Bart
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Jeremy Roussak

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Re: Can someone explain this visual or lens phenomina?
« Reply #106 on: November 24, 2016, 12:42:43 pm »

Yup, but that's how Adams described the series once So Long, and Thanks for All the Fish came out, so I still use the phrase :-)

To be strictly accurate, the phrase he used was "the fifth book in the increasingly inaccurately named Hitchhikers' Trilogy". They were fun, though, as were the radio and TV series, if not that awful film.

Jeremy
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Farmer

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Re: Can someone explain this visual or lens phenomina?
« Reply #107 on: November 24, 2016, 01:26:45 pm »

Yes, but I wasn't trying to be strictly accurate, Jeremy, just enjoying the memory.  Yes, the movie was dreadful, despite wanting it to be great.

Still, my favourite lines in the whole series are:

"It's unpleasantly like being drunk."
"What's so unpleasant about being drunk?"
"You ask a glass of water."
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Phil Brown

Phil Indeblanc

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Re: Can someone explain this visual or lens phenomina?
« Reply #108 on: November 24, 2016, 02:38:57 pm »

"Don't Panic"

Although I do question the mental sanity of the Flat-earthers, assuming they even believe themselves.

The recent video that Phil pointed at, mentioned as proof for the earth being flat that the Earth is stationary, and the sun only vanishes behind the horizon during sunset, because it moves further away ...

I rest my case. Enough time wasted.

Cheers,
Bart

This is wher eI don't bother eirther. Who am I to PERSONALLY understand and explain things. If X tells me so, I certainly wont be the first buying into what X tells me. So I rather try and see things for myself. Like the curvature test.

Bart, What if you went out and did a few tests in calm waters and saw for yourself and applied the math and calculated that the water you were measure was indeed level. What would you think of things then?

Then what do you do?
How do you interepret your personal well conducted and repeated observation? How can that apply to ALL the things you learned and studied? Besides that the formula, the theorem that defines and stablizes all the things we build on it. And those things we cannot explain, we simple rely on "smarter" people to come up with theories that can be proven in a model, yet we take for truth because some one or group or entity has said to take it as such.
We are in 2016. There are footage from a few commercial rockets that have gone up. and their footage shows that the rocket just hits the top. The video was made to just see how high it would go, and with lack of O2, and thrust it slowed down and then it made a hit at some top point, which to me is just something I cannot process.

WHat explanation do you have for this incident? Not any theory or what was supposed to happen. Assuming the footage is authentic. We have 2 camera views time synced. Which is a HUGE amount more than any "official" footage we have been provided by other organizations.

What do you make of that? Not to say its all hog wash, and the easiest thing to do is to not even addess it and repeat what you know.

Look at the evidence of this thread alone. From one test, we have 6 pages of explanations that tell you so many things about what we have ALREADY studied and can repeat it, expand on it, all nicely and with great intellect to boot.  But it all has simply avoided a test that gives the basis of basic science that is the empirical evidence facts are based on.

I'd like to try and avoid the next pages to come in this thread to all be based on that of which we have already read and accepted as an understanding. And then go off into some piss match where one person read someone else theory and how they coinside and they are both happy they were able to reitterate this info as the gospal, and be merry.

I posted this hear in my curiosity with consideration that we not only have "scientists" here, but mainly observers. Those who have traveled and seen the horizon as I have on so many occasions, and for a brief second cross the mind that what I see is not always in sync with what I have studied and known to understand, but move on, as what I learned must be so. We have civil engineers here, pilots, sea captains, fisherman, coast guards, and mainly observers of how the sun rays fall on us. As we apply what we know in the practical world, and make a mental DISCONNECT when we talk of things we cannot, or have a hard time experiencing ourselves. Maybe not all of us, asi some can be thinking about everything as energy and such. But without theories....

....Maybe this needs a hypothetical approach to even consider doing a simple, documentable test? (As others have, and as it leave much open for dispute, or at least textbook conversation as in these pages).

uncut footage, GoFast Rocket
https://youtu.be/001IXnp0ogc

If this video doesn't tell you anything you can expand on, it should tell you one thing. We the mass public have enough tools and capabilities to conduct tests that help us understand and qualify what once only theories could.
« Last Edit: November 24, 2016, 02:56:10 pm by Phil Indeblanc »
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Bart_van_der_Wolf

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Re: Can someone explain this visual or lens phenomina?
« Reply #109 on: November 24, 2016, 02:59:31 pm »

This is wher eI don't bother eirther. Who am I to PERSONALLY understand and explain things. If X tells me so, I certainly wont be the first buying into what X tells me. So I rather try and see things for myself. Like the curvature test.

Bart, What if you went out and did a few tests in calm waters and saw for yourself and applied the math and calculated that the water you were measure was indeed level. What would you think of things then?

Water is not level. It is attracted by gravity, and thus follows the shortest route to the lowest level (nearest to the center of gravity). It is easier to see that it follows the curvature of the earth's surface as the viewing distance increases, but the water horizon is at the same short (say 5 km) distance when you look around, so it doesn't look curved when looking sideways.

Cheers,
Bart
« Last Edit: November 24, 2016, 03:40:04 pm by BartvanderWolf »
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Phil Indeblanc

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Re: Can someone explain this visual or lens phenomina?
« Reply #110 on: November 24, 2016, 03:34:34 pm »

Water is not level. It is attracted by gravity, and thus follows the shortest route to the lowest level (nearest to the center of gravity). It is easier to see that it follows the curvature of the earth's surface as the distance increases, but the water horizon is at the same short (say 5 km) distance when you look around, so it doesn't look curved when looking sideways.

Cheers,
Bart

1. "Water is not level" ? This I am not sure I follow.
So the top of a body of still water is not level? 

2. Water follows the shortest route to the shallowest point, and fills up once that "container" is filled.  We see this from small masses of water bodies, to very large. When we go over miles of bodies, this principal law of empirical fact doesn't get distorted. Our vision gets limited. Which we can counter and see further.

3. "It is easier to see that it follows the curvature of the earth's surface as the distance increases"
So far, since this is something we can do currently with modern tools, I think we need to establish this evidence.
Why? because there are hundreds if not thousands of video footage with both showing a level horizon from a far distance, and those showing a curvature to the horizon. This would mean that the flat footage is either false, or the curvature footage is false. The curved footage is often, if not always the case of a fisheye lens.

4. This I may need to look at myself.  So if I look straight ahead miles across, I see a level horizon, Because , you are explaning that what I see is too close for it to have a curve? Am I understanding this right? Looking sideways, I think you lost me, or I lost you :-)
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Telecaster

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Re: Can someone explain this visual or lens phenomina?
« Reply #111 on: November 24, 2016, 03:47:59 pm »

IMO most of this stuff comes down to the fact that getting far enough away from our planet to see the whole thing at once is something so few people have done. If this ever becomes commonplace enough that anyone can in principle do it, even if most people don't actually do it, the resulting shift in worldview will be such that the moon-landing/spherical-earth denial phenomenon will fade. In the meantime, while it can be fun to engage with such notions in the abstract, trying to actually reason with these folks is IMO a waste of time.

-Dave-
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Phil Indeblanc

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Re: Can someone explain this visual or lens phenomina?
« Reply #112 on: November 24, 2016, 04:40:29 pm »

IMO most of this stuff comes down to the fact that getting far enough away from our planet to see the whole thing at once is something so few people have done. If this ever becomes commonplace enough that anyone can in principle do it, even if most people don't actually do it, the resulting shift in worldview will be such that the moon-landing/spherical-earth denial phenomenon will fade. In the meantime, while it can be fun to engage with such notions in the abstract, trying to actually reason with these folks is IMO a waste of time.

-Dave-

"If this ever becomes commonplace enough"

I have a similar point of view on it...At least for the premise of it.
 
With what we are shown, OF COURSE  it will be commonplace for anyone with some loot to travel as astronauts.
Don't we have commercial space rockets now? Doesn't Virgin and Musk, and maybe a few others have such a thing now? 

According to hot air balloons, which is the cheapest way to travel up, we can simply have a O2 tank and a hot air balloon ride to go very high. Sadly a lot of the footage is with a fishEye, as GoPros are very popular.



All this stuff leaves me with questions that point BACK to the source of the footages. Are we simply saying this footage is false, fabricated? showing some phenomina that is only explained by a few? Which is it?

Did you see the GoFast rocket footage I posted?
What do you think of it?
[/b]

What can you explain JUST FROM THAT?


Not your understanding of what you know. But define what you are observing. (And certainly not reading over 500 comment posts replying to that same very question of why it stops abruptly. If you read those posts, you minimize your chance for you to think independently.)

How can something this clear and so "undeniable" still be so polarizing and misrepresented in 2016?

Please respond in order...Don't omit what you care not understand. Try! Your beliefs may sway from the classic religious understanding, to todays expansion on "theory approach" of understanding. The most important one is the video response.

Here is the link again
https://youtu.be/001IXnp0ogc

From 2004, which halted their work as they did 72+ miles.  Then in 2014, 10 years later to only reach about the same limit, or more accurate reading of 73 miles.
« Last Edit: November 24, 2016, 05:07:24 pm by Phil Indeblanc »
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pcgpcg

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Re: Can someone explain this visual or lens phenomina?
« Reply #113 on: November 24, 2016, 09:12:35 pm »

So the top of a body of still water is not level? 
If you are referring to a body of water on the surface of the earth, then yes, it is not absolutely "level". I put level in quotes because if you mean by level, that all points on the surface of the water are equidistant from the center of the earth, then yes, it is level. However, if you mean that all points on the surface of the water lie on a straight line, then no, it is not level.
« Last Edit: November 24, 2016, 09:16:05 pm by pcgpcg »
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fdisilvestro

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Re: Can someone explain this visual or lens phenomina?
« Reply #114 on: November 24, 2016, 09:31:32 pm »

If you are referring to a body of water on the surface of the earth, then yes, it is not absolutely "level". I put level in quotes because if you mean by level, that all points on the surface of the water are equidistant from the center of the earth, then yes, it is level. However, if you mean that all points on the surface of the water lie on a straight line, then no, it is not level.

Just being pedantic here,

The surface of the water is affected by the gravity vector (which does not necessarily point exactly to the center of the earth) and by the combined gravitational forces of the sun and moon (otherwise we would not have tides). So all the points on the surface of the water are just "approximately" equidistant to the center of the earth.

In relation to whether the earth is flat or a sphere, it is 2016,  no time for this kind of nonsense.

Regards

Ray

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Re: Can someone explain this visual or lens phenomina?
« Reply #115 on: November 24, 2016, 09:44:34 pm »

Bart, What if you went out and did a few tests in calm waters and saw for yourself and applied the math and calculated that the water you were measure was indeed level. What would you think of things then?

I'm sure Bart is much better at maths than I am. It would be an interesting mathematical exercise to calculate how much of a rise in the centre of, say, a 5km stretch of sea horizon should be observable if the sea waters were perfectly still, and the camera and lens, or measuring device, were perfectly accurate with no distortion, and, as Francisco points out, we were able to eliminate the gravitational effects of the sun and moon.

The circumference of the earth is about 40,075 km at the equator. The diameter of that circle is about 12,756 km. A 5 km stretch of horizon represents about 0.0125% of the circumference of the earth. That's as far as my maths takes me. I think I'm right on that point, but please correct me if I'm wrong.  ;)
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pcgpcg

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Re: Can someone explain this visual or lens phenomina?
« Reply #116 on: November 24, 2016, 09:55:16 pm »

It would be an interesting mathematical exercise to calculate how much of a rise in the centre of, say, a 5km stretch of sea horizon should be observable
roughly a half meter

Using your numbers and referring to the diagram below...
The radius of the earth (line AD) is 6378m. If the arc DE is 5km, then the arc DC is 2.5 km, and the line BD is approximately 2.5 km.
The line BC is the height of the water above a straight line between the points D and E (which are 5 km apart) due to the curvature of the earth.
BC = AC – AB
and because AD = AC, BC = AD – AB
Some trigonometry (remember that old Indian chief)…
AB = 6378 cos (invsin (2.5/6378)) = 6377.99951 (from my little TI calculator)
So BC = 6378 – 6377.99951 = .489m


I'm done with this. The tryptophan is kicking in and it occurs to me that nothing I can say will ever convince a flat earther that the earth is not flat. My time is better spent taking a nap. Happy Thanksgiving everyone, flat earthers included. :).
« Last Edit: November 26, 2016, 12:36:31 pm by pcgpcg »
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Ray

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Re: Can someone explain this visual or lens phenomina?
« Reply #117 on: November 24, 2016, 11:06:48 pm »

roughly a half meter


Thanks. One would not expect such a small rise in the middle of a 5 km stretch of horizon to be noticeable, considering the rise and fall of waves and the pulling of the moon and the sun's gravitational effects, especially when taking a photograph of such a horizon when there's always some degree of barrel or pincushion distortion present, and/or always some correction to the image that takes place.
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Farmer

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Re: Can someone explain this visual or lens phenomina?
« Reply #118 on: November 24, 2016, 11:26:15 pm »

On a normal ocean, it wouldn't be noticeable.

There is a reason, of course, why the territorial waters limit was generally considered to be 5 miles.  That was a the distance at which someone on the coast could generally see a sailing ship.  Beyond that, it's hidden by the curvature of the Earth.  If you can't see it, you can't really tell it to go away and, for that matter, neither can the ship see land until around that distance (various mountains and so on obviously change that, but for flat coast it holds true).
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Jeremy Roussak

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Re: Can someone explain this visual or lens phenomina?
« Reply #119 on: November 25, 2016, 03:57:49 am »

Yes, but I wasn't trying to be strictly accurate, Jeremy, just enjoying the memory.  Yes, the movie was dreadful, despite wanting it to be great.

Still, my favourite lines in the whole series are:

"It's unpleasantly like being drunk."
"What's so unpleasant about being drunk?"
"You ask a glass of water."

Those are among my favourites too. Others include

"It's at times like this that I wish I'd listened to what my mother used to tell me when I was a child."
"What did she say?"
"I don't know. I didn't listen."

and the description of a Vogon spaceship as "not so much designed as congealed".

Jeremy
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