However, X-rays have higher energies than visible light. An X-ray is made up of X-ray photons (which are the particles that carry the energy) and X-ray wavelengths (the length of the X-ray). X-ray photons travel at a speed of about 186,000 miles per second.
An x-ray machine sends individual x-ray particles through the body. The images are recorded on a computer or film.
✅ Dense structures (such as bone) will block most x-ray particles and appear white.
✅ Metal and contrast media (special dye used to highlight areas of the body) will also appear white.
✅ Structures containing air will be blank, and muscle, fat, and fluid will appear shades of gray.