The Davisson-Germer experiment is the direct evidence of

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

According to Bohr's theory,the electron in orbits has definite energy values. Then,according to the uncertainty principle,the lifetime of an excited state will be:

Explain the arrangement of the Davisson and Germer experiment.

In the Davisson-Germer experiment,an electron beam of energy $75 \ eV$ falls normally on the surface of a crystal. If the maximum intensity is obtained at an angle of $45^o$ to the direction of the incident beam,then the inter-atomic distance in the lattice plane of the crystal will be .............. $\mathring{A}$

An electron behaves like a wave because it......