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More examples of A toy boat is in the middle of a swimming pool. If you want to capsize it, you have two possibilities: to launch stones (particle concept) or to make waves (waves concept). Let's replace stones by a high-pressure water cleaner like a “Kärcher”. The water that flows out of the Kärcher can be considered as a particle and has all of its characteristics. In fact, we can capsize the small boat by pointing the Kärcher towards it. Now let's put the end of the gun in the water of the swimming pool. The water from the Kärcher, which was like a particle in the air, will also be like a particle in the water. This operation does not change the corpuscular nature of the water that flows out of the lance. We can then observe that the water, therefore like a particle, is transformed gradually into waves. If, moreover, we actuate the Kärcher for a short time, comparable to the action time of a particle, we can see that the small jet of water coming out from the gun becomes a single wave. Nature offers us identical situations: the water of Niagara Falls has a particle behavior during its fall and, once it has reached the river down below, the particles become "eddies", like waves. The opposite situation also exists: let's take the example of an almost empty swimming pool. If we make only one wave in the residual water, some amount of water will spill out of the evacuation valve. Thus, the wave is transformed into a short filament of water, or "particle". The water that comes out from the evacuation valve is obviously not a wave. Yet, it is the same water that, a few seconds ago, was a wave. However, in our example, water coming out from the gun can't be transformed into waves if the experiment is done in air. This transformation is possible only if the medium is also water. In other words, the medium must also be in the same composition as the particle and the wave. It is a necessity. |