Which contribution did Edison make related to X-ray technology?

Which contribution did Edison make related to X-ray technology?

• A. A handheld Crooks tube (Vitascope)
• B. Barium platino-cyanide paper as a screen
• C. Calcium tungstate as screen detector material
• D. An x-ray tube that circles around the patient

Answer: (C)

The key idea is how screens convert X-ray energy into visible light to reveal an image, and Edison’s notable contribution was the introduction of calcium tungstate as a screen material. Edison experimented with different phosphors to create a more efficient, brighter screen that would fluoresce when struck by X-rays, making radiographic images easier to see on film. Calcium tungstate produced strong fluorescence and improved the exposure efficiency, which helped produce clearer radiographs and contributed to the practical development of screen-film radiography. The other options don’t reflect Edison’s documented work in this area: the Crookes tube and Vitascope relate to other technologies, barium platino-cyanide paper isn’t the screen material Edison championed, and a rotating X-ray tube around the patient isn’t attributed to him.

The key idea is how screens convert X-ray energy into visible light to reveal an image, and Edison’s notable contribution was the introduction of calcium tungstate as a screen material. Edison experimented with different phosphors to create a more efficient, brighter screen that would fluoresce when struck by X-rays, making radiographic images easier to see on film. Calcium tungstate produced strong fluorescence and improved the exposure efficiency, which helped produce clearer radiographs and contributed to the practical development of screen-film radiography. The other options don’t reflect Edison’s documented work in this area: the Crookes tube and Vitascope relate to other technologies, barium platino-cyanide paper isn’t the screen material Edison championed, and a rotating X-ray tube around the patient isn’t attributed to him.