in quantum mechanics, when we analyze the potential step: we say
that a classical bowling ball do not reflect because its wavelength
is so small that we do not have a step whose rising distance is
comparable with the ball's wavelength.
Question: If I assume we a particle whose mass is 100m, and it
is composed of 100 particles having mass m. If the big mass moves
with a constant speed v then all the small particles move with the
same speed, so the momentum of the 100m composition is 100 times
greater than its sub particles, consequently its wavelength is 100
times smaller. If we have a potential step whose rising distance is
comparable with the wavelength of the sub particles, so it is not
comparable with the 100m composition particle.
Ie know that a bowling ball does not reflect, so I should
consider the particles as a whole. However, I do not understand
what changes for small particles when they have some friends while
entering a potential step that they pass without reflecting instead
of having a reflection probability -as in the case when we send a
small particle.