Variable Model of the Fine-Structure Constant
Recent evidence suggests that the fine-structure constant c e α h 2 = , a measure of the strength of the electromagnetic interaction between photons and electrons, is slowly increasing over cosmological timescales. High-resolution measurements of quasar spectra suggest that there has been a variation ∆α/α =-0.72 ± 0.18×10 over the past 6-10 Gyr.To model this, we propose variability in the speed of light that produces a cosmological time variation  α α / &  = 10 and 10 yr at z = 3 which also agrees with the observational spectral data.