A helium atom (mass ) moves at toward a nanopore of diameter

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

A helium atom (mass 6.6×10−27 kg6.6\times10^{-27}\,\text{kg}) moves at 1.5×103 m s−11.5\times10^{3}\,\text{m}\,\text{s}^{-1} toward a nanopore of diameter 10 nm10\,\text{nm}. Calculate the atom’s de Broglie wavelength and state whether quantum effects are expected to be important as it passes through the nanopore. Give numerical values with appropriate units.

Related theory

Browse the problem library