Wilhelm Conrad had a major in physics and was the first person to discover the X-Ray. He already was experimenting with the cathode rays in 1895 before he actually discovered X-Rays.
His experiments required passing electric current through gasses at extremely low pressure. On November 8, 1895 while he was experimenting he observed that certain rays were emitted during the passing of the current throughout the discharge tube.
However, his experiment required him to work in a dark room completely covered in a discharged tube. That resulted in the emission of rays which illuminated a bariumplatinocyanide covered screen. That screen became fluorescent. It was placed in the path of the rays. That was in the path of the rays, two meters away from discharge tube.
His experiments required passing electric current through gasses at extremely low pressure. On November 8, 1895 while he was experimenting he observed that certain rays were emitted during the passing of the current throughout the discharge tube.
However, his experiment required him to work in a dark room completely covered in a discharged tube. That resulted in the emission of rays which illuminated a bariumplatinocyanide covered screen. That screen became fluorescent. It was placed in the path of the rays. That was in the path of the rays, two meters away from discharge tube.