The α Rays of Radium

Abstract

IT is true, as Mr. Nance points out, that the velocity of the α rays may be expected to diminish in proportion to the distance of air traversed, and it follows, therefore, that the magnetic deviability should correspondingly increase, for the displacement experienced by the particle in unit time by a constant magnetic force from the position it would occupy if no force were acting is constant. With diminishing velocity the displacement in unit distance, and therefore the angular deviation, must increase.