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Macroscopic : ウィキペディア英語版
Macroscopic scale

The macroscopic scale is the length scale on which objects or phenomena are large enough to be visible practically with the naked eye, without magnifying devices.
When applied to physical phenomena and bodies, the macroscopic scale describes things as a person can directly perceive them, without the aid of magnifying devices. This is in contrast to observations (microscopy) or theories (microphysics, statistical physics) of objects of geometric lengths smaller than perhaps some hundreds of micrometers.
A macroscopic view of a ball is just that: a ball. A microscopic view could reveal a thick round skin seemingly composed entirely of puckered cracks and fissures (as viewed through a microscope) or, further down in scale, a collection of molecules in a roughly spherical shape.
Classical mechanics may describe the interactions of the above-mentioned ball. It can be considered a mainly macroscopic theory. On the much smaller scale of atoms and molecules, classical mechanics may not apply, and the interactions of particles is then described by quantum mechanics. As another example, near the absolute minimum of temperature, the Bose–Einstein condensate exhibits elementary quantum effects on macroscopic scale.
The term "megascopic" is a synonym. No word exists that specifically refers to features commonly portrayed at reduced scales for better understanding, such as geographic areas or astronomical objects. "Macroscopic" may also refer to a "larger view", namely a view available only from a large perspective. A macroscopic position could be considered the "big picture".
==See also==

*Microscopic scale
*Quantum realm

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Macroscopic scale」の詳細全文を読む



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