[填空题]
1.De Broglie related the wavelength of a particle to itsakh *(5o*-;, 9pb2kh2 gzr fludvh arc xrzeyb7-s7r-/;lx xnt9ctc7momentum. State what is meantx/te;9r7 r-ns cxx- cz77ltby 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 = $\times10^{-10}\,m$
