Quote from: ZL on February 24, 2017, 05:49:56 PM







How can we have a wave superposition or interference if there is only one single wave pulse? Don't we need at least two waves to be added together? In this case the front side of the wave pulse turns back at the end to overlap with its own back side (tail). The two pulse segments propagating in opposite directions will get superimposed just the same way as if they were two independent waves. That is why we observe interference only at the very ends, and get double amplitude.

Now comes the key question:
Brilliant! We have produced wave superposition in direct phase and got a pulse of double amplitude. According to the FE principle from wave fields this supposed to contain excess energy... right? Well, think twice! Think hard, because this is a tricky and very counterintuitive property of waves! You can slip up here again very easily. If you think there is excess energy produced, then explain why, and how much. If you think there is no excess energy produced, then again you should be able to state the reason, and explain it. Remember, we are not interested in entertaining rosy illusions and chase fake FE devices, but in generating real excess energy. The first step towards that goal is to weed out false hopes and illusions.

I think you can get a superposition from one wave if its being reflected on itself,
this is how a standing wave forms.
Also,  the point of a double amplitude happens at a half wave length. I think
that we don't have a net energy gain, since the resulting wave is shorter, even though higher.

Quote from: telecom on February 25, 2017, 02:51:32 PM
I think you can get a superposition from one wave if its being reflected on itself, this is how a standing wave forms.

Sure, this has been already clarified.

QuoteI think that we don't have a net energy gain, since the resulting wave is shorter, even though higher.

OK, then let's forget the superposition at the open end of the Tline for now. Instead let us examine a clear case of superposition of two separate pulses that propagate in opposite directions, and meet at the middle of the transmission line. In that case we can not say that the resultant superposed pulse's length is shorter than that of the merging two pulses. All 3 pulses have the same length.

Please watch the video from 6:32-6:44. At 6:32 two identical waves are generated in the middle of the line and they move away from one another, then after reflection from the ends they converge, and meet in the middle forming a superposed pulse of double amplitude at 6:44. In this case there is no difference in pulse length. So what is you expectation now? Do we have a gain of excess energy in this case? Again, please also explain why?

Quote from: ZL on February 25, 2017, 04:15:07 PM
Sure, this has been already clarified.

OK, then let's forget the superposition at the open end of the Tline for now. Instead let us examine a clear case of superposition of two separate pulses that propagate in opposite directions, and meet at the middle of the transmission line. In that case we can not say that the resultant superposed pulse's length is shorter than that of the merging two pulses. All 3 pulses have the same length.

Please watch the video from 6:32-6:44. At 6:32 two identical waves are generated in the middle of the line and they move away from one another, then after reflection from the ends they converge, and meet in the middle forming a superposed pulse of double amplitude at 6:44. In this case there is no difference in pulse length. So what is you expectation now? Do we have a gain of excess energy in this case? Again, please also explain why?

I think we have a double energy wave in this case.
In our case,  wave consists of the masses located at the different heights along the length of the wave.
Since the length of the wave is the same, but the masses are 2 times higher,
the energy of the wave should be doubled as well.
According to the formula E=mgH.
Regards

Quote from: telecom on February 26, 2017, 01:23:37 PM
According to the formula E=mgH.

Alex, please take a good look at the wave machine, and notice how it was built (its structure), and explain how it operates. Your explanation indicates that you don't understand how it works. Without the proper understanding of its working principle, you have no chance to get even close to understanding the wave energetics in it. When you get this working principle right, then we can come back to explain why you think there is double energy in the superposed pulse.

A hint that will give away the working principle: gravity has nothing to do with it. It would work the same (or nearly the same) in zero gravity in space as well.

Quote from: ZL on February 26, 2017, 01:39:41 PM
Alex, please take a good look at the wave machine, and notice how it was built (its structure), and explain how it operates. Your explanation indicates that you don't understand how it works. Without the proper understanding of its working principle, you have no chance to get even close to understanding the wave energetics in it. When you get this working principle right, then we can come back to explain why you think there is double energy in the superposed pulse.

A hint that will give away the working principle: gravity has nothing to do with it. It would work the same (or nearly the same) in zero gravity in space as well.

Its interesting, I always thought it is similar to lifting weights.
I will take another look and update.
Regards