Which phenomenon best supports the theory that matter has a wave nature?

What is a wave packet? Explain using a necessary diagram.

Consider two separate ideal gases of electrons and protons having the same number of particles. The temperature of both gases is the same. The ratio of the uncertainty in determining the position of an electron to that of a proton is proportional to :-

Explain the arrangement of the Davisson and Germer experiment.

In the Davisson-Germer experiment,which is the correct curve between the intensity $(I)$ of scattered electrons and the scattering angle $(\phi)$?

In the Davisson-Germer experiment,when electrons strike a $Ni$ crystal,which of the following waves are diffracted?