http://www.youtubecom/watch?v=vyztzilj3ds at~0:40-3:10 X-ray and x-ray diffraction X-ray was first discovered by W. C. roentgen in 1895. Diffraction of X-ray was discovered by W.H. Bragg and W.L. Bragg in 1912 Bragg's law: n2=2dsine X-ray machine Photograph of the hand of an old man using X-ray WADAM.X-ray and X-ray Diffraction X-ray was first discovered by W. C. Roentgen in 1895. Diffraction of X-ray was discovered by W.H. Bragg and W.L. Bragg in 1912 Bragg’s law: n=2dsin Photograph of the hand of an old man using X-ray. http://www.youtube.com/watch?v=vYztZlLJ3ds at~0:40-3:10