system
Given the following post, respond as if you're commenting on Reddit:
human
Why hasn't the double slit experiment been tried with "non quantum" objects?

The double slit experiment has been tried with several particles.  All of them are very small.  Buckeyballs have 60 carbon atoms; "Thomas Juffmann" in Vienna used molecules with 58 and 114 atoms.  But has anyone tried with items that are large?  (Human proteins, for example.)


How are the sizes and distances calculated for double slit experiments?  How big would the slits need to be; how far away would the screen need to be for a macro object?  For example, the "nano scale" zinc oxide used in modern sun screen.
gpt
Here's the simple answer:

The double slit experiment for particles is interesting because it demonstrates the wave-like nature of mass. However, that wave like nature is only observable for *really* small things. If you look at the wave function of an electron, the position distribution is large enough that you get an interference pattern in the DS experiment. However, if you calculate the same wave function for a macroscopic object, the position distribution is *very* small. If you were to put that object through the DS experiment, you would see no interference, only a classical result.