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Unlike submicroscopic particles, particles in bulk appear to be at rest with little energy?

Why is it so? QM being moreevoloved theory its hould apply to all particles big or samall. Is it because of the larger dimensions the uncertainity in their positions is quite large for larger particles?

1 Answer

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  • SAN
    Lv 5
    1 decade ago
    Favorite Answer

    Not sure I understand the question, but QM does indeed apply to all particles and objects, big or small. You don't notice uncertainty in the macroscopic world because uncertainty in the location of an object is not a significant fraction of the size of the object. It's completely trivial, as is the uncertainty in momentum. Because of its relatively enormous mass, a soccer ball displaying a given amount of uncertainty in momentum would exhibit no observable variance in velocity, no matter how sensitive the instrument. Very different from a subatomic particle with a tiny mass.

    From another aspect, the de Broglie wavelength is tiny compared to the objects dimensions.

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