Rays impart momentum when in contact with matter which implies that Rays possess a finite mass and therefore are particles. Identify Goldstein's work in determining the properties of the proton. Noted that protons emitted from a perforated Cathode surface. Cloud chamber experiments showing condensation trails of neutrons passing through the cloud. Radiation is the wave manifestation resulting from the interaction of an electrical and magnetic fields perpendicular to one another.
Waves are transverse.
Wave train is infinite in both directions. Identify two properties of electromagnetic waves. The linear distance between one point on a wave and the corresponding point on the next wave. When energy is absorbed or liberated by matter it occurs in packets of energy discontinuously. Energy only appears to be exchanged continuously because of the exchange on the atomic level being asynchronously resulting in a continuum of energy exchange.