The X-Ray doodle is a cool blue neon design. The logo also shows a glow of radiation from the each letter of 'Google'. On clicking on the doodle, users can see search results for X-Ray.
Wilhelm Conrad Roentgen invented X-Rays accidentally when he was experimenting with vacuum tubes. A week later, he took an X-ray photograph of his wife's hand which clearly revealed her wedding ring and her bones.
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The photograph electrified the general public and aroused great scientific interest in the new form of radiation.
Roentgen called it 'X' to indicate it was an unknown type of radiation. But still in some German-speaking countries it is referred as Roentgen rays.
So many other scientists like Ivan Pulyui, William Crookes, Johann Wilhelm Hittorf etc were also contributed to the study of X-rays.
Google doodles are known as the decorative changes that are made to the Google logo to celebrate holidays, anniversaries, and the lives of famous artists and scientists. Google celebrates special moments with their Google doodles.