[填空题]
1.De Broglie related the wavelength of a particle njyveb*r-5 * eaw) g:to i,zqoxkys4 3 evxdgx*6p/*,to its momentum. State what is me4s,exop6xz,kygqxd*3 v o/ * iant by matter waves.
2.(1)Show that the wavelength $λ$ of an electron of mass $m$ and kinetic energy $E$ can be found from
λ = $\frac{h}{\sqrt{2mE}}$
(2)Assuming that the magnitude of the energy of a given energy level of an atom is equal to the kinetic energy of the electron, show that the wavelength of the electron in the second energy level in a hydrogen atom is approximately $6.7\times10^{−10}\,m$. $λ$ = $\times10^{-10}\,m$
(3)Use the wavelength from b(ii) to estimate the orbital radius of this electron. r = $\times10^{-10}\,m$
