Rays


 * actinic ray
 * alpha ray
 * anode ray
 * Becquerel ray
 * beta ray
 * canal ray
 * cathode ray
 * cosmic ray
 * crepuscular ray
 * delta ray
 * electromagnetic ray
 * extraordinary ray
 * gamma ray
 * Grenz ray
 * heat ray
 * infrared ray
 * infraroentgen ray
 * ionizing ray
 * Leonard ray
 * light ray
 * matter ray
 * nuclear radiation
 * ordinary ray
 * positive ray
 * Roentgen ray
 * ultraviolet ray
 * X-ray