Which type of wave does not require a medium to travel through? A. wave created by x-rays as they create an image of a bone B. wave created by plucking the strings of a guitar C. wave created by dropping a pebble in water D. wave created by squeezing and releasing a spring
X-rays don't require any material to travel through. X-rays are electromagnetic waves, just like radio, heat, and light are. Electromagnetic waves are able to travel through some materials, but they don't need any in order to move from one place to another.