B 加速电极 mo y QeL KE 发射电 e 子阴级U De broglie wavelength follows from h 12.3° P my v2emU VU 12.3 12.3 or|2===×10(m)or A 12.3 When u=100,元 √U 12.3(A)U B K 发射电 子阴级 加 速 电 极 0 2 m eU V = P h  = em U h 2 0 =  = A U 12.3 m V h 0 = e m0 V  or 10 ( ) 12.3 1 0 m U −  =  or U 12.3  = Å When U=100(V), 12.3 12.3 = = U  (Å) m V = eU 2 0 2 1  De Broglie wavelength follows from