Editing 878: Model Rail

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In model rail construction, the {{w|HO scale}} refers to the most popular scale for modeling railroads, in which 3.5 millimeters in the model corresponds to 1 real-world Imperial foot. As the comic suggests, it works out to a ratio of about 1:87.1 (or 3048:35 exactly, which equals 1:87.08̄5̄7̄1̄4̄2̄). In Europe, the scale is defined as exactly 1:87 instead, to avoid references to non-metric measurements.
 
In model rail construction, the {{w|HO scale}} refers to the most popular scale for modeling railroads, in which 3.5 millimeters in the model corresponds to 1 real-world Imperial foot. As the comic suggests, it works out to a ratio of about 1:87.1 (or 3048:35 exactly, which equals 1:87.08̄5̄7̄1̄4̄2̄). In Europe, the scale is defined as exactly 1:87 instead, to avoid references to non-metric measurements.
  
This comic features [[:Category:Multiple Cueballs|two Cueballs]] conversing; we'll refer to them as Lefty and Righty to avoid confusion. The conversation takes place in Lefty's basement. Lefty is apparently a less-experienced train modeler, and he tells Righty that he wants to make an HO model layout of his town. However, the more-experienced Righty points out that this is a bad idea, due to nesting. To make it a perfectly accurate model, Lefty would have to include a model of his house, which includes his basement, which includes the model. So, he would have to make a model of the model, which will include a smaller model of the model, and so forth. This is illustrated in the comic. Real world examples of nested models include the {{W|Bourton-on-the-Water model village}}, which includes 4 levels of nested models. Artwork that includes a depiction of itself is known as the {{W|Droste effect}}.
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This comic features [[:Category:Multiple Cueballs|two Cueballs]] conversing; we'll refer to them as Lefty and Righty to avoid confusion. The conversation takes place in Lefty's basement. Lefty is apparently a less-experienced train modeler, and he tells Righty that he wants to make an HO model layout of his town. However, the more-experienced Righty points out that this is a bad idea, due to nesting. To make it a perfectly accurate model, Lefty would have to include a model of his house, which includes his basement, which includes the model. So, he would have to make a model of the model, which will include a smaller model of the model, and so forth. This is illustrated in the comic.
  
 
At the end of these six nested models ''The Matryoshka limit'' is stated: "It is impossible to nest more than six HO layouts". {{w|Matryoshka doll|Matryoshka dolls}} are toys of Russian origin that can be stacked inside one another. Here, the "Matryoshka limit" is the hard barrier that follows as a result of the nesting. Matter is not infinitely divisible; once one gets to the level of atoms, it is impossibly difficult to go any smaller. The unit shown in the last diagram is the {{w|Angstrom|ångström}}, a very small unit of measurement (1/10000th of a {{w|micrometre}}, 1/10 of a {{w|nanometre}}, 100 {{w|picometre}}s or 10<sup>−10</sup> m) which was created when humans started discovering objects on an atomic scale, such as crystal structures or wavelengths. The last nested model looks like the atoms on a surface as seen using a {{w|scanning tunneling microscope}} (STM).
 
At the end of these six nested models ''The Matryoshka limit'' is stated: "It is impossible to nest more than six HO layouts". {{w|Matryoshka doll|Matryoshka dolls}} are toys of Russian origin that can be stacked inside one another. Here, the "Matryoshka limit" is the hard barrier that follows as a result of the nesting. Matter is not infinitely divisible; once one gets to the level of atoms, it is impossibly difficult to go any smaller. The unit shown in the last diagram is the {{w|Angstrom|ångström}}, a very small unit of measurement (1/10000th of a {{w|micrometre}}, 1/10 of a {{w|nanometre}}, 100 {{w|picometre}}s or 10<sup>−10</sup> m) which was created when humans started discovering objects on an atomic scale, such as crystal structures or wavelengths. The last nested model looks like the atoms on a surface as seen using a {{w|scanning tunneling microscope}} (STM).

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