The Invisible Ray

The Invisible Ray is a 1936 American science-fiction horror film directed by Lambert Hillyer. It stars Boris Karloff as Dr. Janos Rukh, a scientist who comes in contact with a meteorite composed of an element known as "Radium X". After exposure to its rays begins to make him glow in the dark, his touch becomes deadly, and he begins to be slowly driven mad. Alongside Karloff, the film's cast includes Bela Lugosi, Frances Drake, Frank Lawton, Walter Kingsford, Beulah Bondi, Violet Kemble Cooper, and Nydia Westman.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster by Karoly Grosz (Public domain).