X-rays are produced by high-energy wavelength beams that penetrate the body, with dense materials like bone blocking the beam.

“an x-ray is nothing more than a series of contrasts going from black to white and everything in between so at the highest level how do we take an x-ray what are we doing with those little electrons going through someone and how does it produce that image for sure and it's quite amazing actually how it was discovered by run and effectively what it is we're taking these high-energy wavelength and it actually penetrates right through their body and anywhere where there's something dense very hard like bone the x-ray beam can't make it through”