why water goes upward?
 

Have you guys seen this?

<iframe title="Strange & Amazing on Yahoo! Video" width="640" height="590" src="http://video.yahoo.com/network/101149635?v=8743939&l=5144241" frameborder="0" allowfullscreen></iframe>

cool optical illusion.

looking at it the second time, there are only 2 towers. How he make us see the zic zac????????

This theory seems to work.

Possible Explanation for Escher Waterfall Machine | Geekosystem

seem like a lot of work for this short video

I think the first segment goes downwards, which gives the water enough kinetic energy to "climb" the remaining segments. The way he fills the waters in also seems to matter, as it creates a wave effect.

But the more a look at this thing, the less I understand how it is built. There is some wicked optical illusion designed in there, so who knows how it really works...

The first three legs are sitting on the floor and running either flat or slightly down hill. If you compare the height of the base where the wheel is to the side wall height of the legs it does not change. There are steps cut in the side walls to look as though it is stepping down. The last leg that makes a left looks to run slightly up hill. You can see the change behind the left pillar of the right tower. You can actyually see the water pool at this point before it continues to move. The legs of the water fall are not actually attached to the toers. The towers are strategically placed to look like the legs are attached and are running up hill. But in reality the towers do nothing. Try and remove the towers with your minds eye and you can see it. So the weight of the water falling out of the pitcher and eventually from the water wheel is enough to push the water slightly up hill on the last leg.

I should also add the last leg where the water pools is turning back on it's self. Not a 45 deg. angle but probably much sarper inorder to get the end over the water wheel.

The water is clearly falling some distance to hit the water wheel. How do you explain that? Also, it appears to be a perpetual motion machine.

Oh those pesky physics. Water does not flow uphill.

Unless it's hooked up to a gererator. ;)

The joys of forced perspective.

This explains it fairly well, taken from another site.

Take a close look at the reflections in the water on the floor for clues.

http://forums.pelicanparts.com/uploa...1298233482.jpg

Illusion? Maybe. But remember Water always flows down gradient which means that it can flow up hill.

The video was edited. You can see at least one cut, shadows are funny and how the water never flows into one corner.

It's an illusion, no doubt. Regardless of the method, it is well executed in my opinion. I've enjoyed it.

Well done!

Agreed... it reminds me of the Penn and Teller bit where they do the 3 Cups trick with clear cups, showing you how it's done.

Even watching it with everything shown to you, it's still amazing.

I watched the video before and was trying to figure it out, but then the commercial streaming-video format stopped this.

I could not get the streaming-video in the thread to pause and/or exit. How did these speakers get so loud? Stop. Stop. Do not want.

+1000

What is even more puzzling is why some people feel the need to try to believe what it obviously not true.
Call it the bigfoot or ufo syndrome for lack of better terms, they NEED to believe in the unbelievable.
Doan know why exactly.

This is pretty cool. He could be a better showman though. Why stage this is a crappy garage?

Ever wonder why people "check" their video cameras by standing in front of it and looking into the lens?

It's more believable this way.

Hey!

No religion bashing here. Move it to PARF. :D