The document proposes a mechanism for electron pairing and superconductivity in metals at low temperatures. It suggests that constant virtual stimulated transitions of valence electrons, driven by electromagnetic wave modes coupled to lattice vibrations, can lead to electron pairing. At zero temperature, each electron near the Fermi energy pairs with another electron at a lower energy level, giving the pairs a minimum binding energy equal to an energy value Δ related to lattice vibration frequencies. This electron pairing produces superconductivity in metals below a critical temperature that depends on the strength of electromagnetic wave modes at low frequencies associated with long-range lattice vibrations.