26. Which of the following is not true about X-rays? A.Have low penetrating power B.Travel with the speed of light C.Can be reflected or refracted D.Can affect photographic plates
Option A Solution: X-rays and gamma rays are photons, i.e. high energy light-waves. When emitted by a source, for example, radium or cobalt, located outside the body, they easily pass through the body, hence they are usually called penetrating radiation. Because X-rays are penetrating, they can be used in diagnostic medicine to image human bones or human organs made opaque by a dye.
