Atoms

The de-Broglie wavelength of an electron is the same as that of a 50 keV X-ray photon. The ratio of the energy of the photon to the kinetic energy of the electron is (the energy equivalent of electron mass is 0.5 MeV)

• 1 : 50

• 1 : 20

• 20 : 1

• 50 : 1

Consider two particles of different masses. In which of the following situations the heavier of the two particles will have smaller de-Broglie wavelength ?

• Both have a free fall through the same height

• Both move with the same kinetic energy

• Both move with the same linear momentum

• Both move with the same speed