The double-slit interference pattern for helium atoms (Figure 4.13) shows that the kinetic energy o…

The double-slit interference pattern for helium atoms (Figure 4.13) shows that the kinetic energy of the beam of atoms was 0.020 eV. (a) What is the de Broglie wavelength of a helium atom with this kinetic energy? Estimate the de Broglie wavelength of the atoms from the fringe spacing in Figure 4.13, and compare your estimate with the value obtained in part (a). The distance from the double slit to the scanning slit is 64 cm.

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