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macroscopic    
a. 肉眼可见的

肉眼可见的

macroscopic
巨观

macroscopic
adj 1: visible to the naked eye; using the naked eye [synonym:
{macroscopic}, {macroscopical}]
2: large enough to be visible with the naked eye [synonym:
{macroscopic}, {macroscopical}]

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  • Practical cosmic speed limit for macroscopic objects?
    The discussion revolves around the upper limits of velocity for macroscopic objects, particularly focusing on the potential speeds achievable through natural processes and theoretical models Participants explore various mechanisms, including gravitational slingshots and advanced technological methods, to accelerate objects to relativistic speeds
  • Heisenberg Uncertainty Principle and macroscopic objects
    The Heisenberg Uncertainty Principle (HUP) is applicable to macroscopic objects, such as a football, despite their composition of numerous particles The discussion highlights the potential to demonstrate this applicability through statistical methods based on elementary particle behavior or by extending the principle from commutation relations between momentum and position The de Broglie
  • Nuclear Macroscopic cross-section - Physics Forums
    The discussion revolves around the concept of macroscopic cross-sections in nuclear engineering, specifically addressing a problem from "Introduction to Nuclear Engineering" by Lamarsh Participants are exploring the relationship between the number densities of constituents in a mixture and their respective normal densities, as well as how these relate to the macroscopic absorption cross
  • Molecular-level explanation of macroscopic phenomena: dissolving
    The discussion revolves around the molecular-level explanation of the process of dissolving sugar in water and the subsequent recrystallization of sugar upon boiling the solution Participants explore the interactions between sucrose molecules and water, as well as the physical changes that occur during dissolution and evaporation One participant describes the macroscopic appearance of sugar
  • The difference between microscopic and macroscopic cross sections . . .
    This discussion focuses on the comparison of microscopic and macroscopic cross sections, specifically for the elements B, Cd, Gd, and Hf relative to the fission cross section of U-235 Microscopic cross sections (σ) are measured in barns, representing the effective area for nuclear reactions, while macroscopic cross sections (Σ) are calculated using the formula Σ = N σ, where N is the
  • Double slit experiment with macroscopic size objects
    The discussion revolves around the feasibility and implications of conducting double slit experiments with macroscopic objects, specifically using grains of sand Participants explore whether such experiments could yield interference patterns similar to those observed with quantum particles, and the necessary conditions for such an experiment
  • Microscopic and macroscopic physics
    The discussion centers on the distinction between quantum mechanics and classical physics, specifically regarding their applicability to microscopic and macroscopic phenomena Quantum mechanics operates on a microscopic scale where probability governs measurements, while classical physics describes macroscopic events with definitive outcomes
  • Calculation of neutron transport cross section - Physics Forums
    Another participant provides a formula for macroscopic transport cross section and mentions specific values of 1-cos (theta) for water and heavy water A different participant questions the origin of the provided values of 1-cos (theta) and reports obtaining significantly different transport cross section values when applying them
  • How Close Do Molecules Get When Two Objects Are Touching?
    The boundaries of a macroscopic object are defined by its electron shells This means that it's kind of meaningless to talk about when they're "really" touching versus when they're "just" interacting electrically





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