The question is, “ Do quantum mechanical effects apply to macro world?” We know that quantum operates at micro level and the macro world phenomenon can be more easily explained with the help of classical physics. read more
The superfluidity of liquid helium is a manifestation of quantum mechanics at the macro level which one can see with one's own eyes. I can think of no better example than superfluidity for showing quantum effects at macro level. The second type of particles are Fermions, which follow Fermi Dirac statistics. read more
In two places at once: Strange world of quantum mechanics shown to work in visible world for first time. The mind-bending laws of quantum mechanics, where tiny atoms and molecules can effectively be in two places at once, have been applied to a visible object for the first time. read more