question_answer 102)

  If travelling at same speeds, which of the following matter waves have the shortest wavelength? (a) Electron (b) Alpha particle (\[H{{e}^{2+}}\]) (c) Neutron (d) Proton

Answer:

  (b) de Broglie wavelength \[\lambda =\frac{h}{m\upsilon }\] For same speed, greater is the mass shorter is the wavelength. Thus, \[\alpha \]-particles will have shortest wavelength.