Electromagentic radiation act somewhat like a particle at times in that they occur as
small “packets” of energy and are referred to as “photons”. Each photon contains a
certain amount (or bundle) of energy, and all electromagnetic radiation consists of
these photons. The only difference between the various types of electromagnetic
radiation is the amount of energy found in the photons. Due to the short wavelength
of X-rays and gamma rays, they have more energy to pass through matter than do the
other forms of energy in the electromagnetic spectrum. As they pass through matter,
they are scattered and absorbed and the degree of penetration depends on the kind of
matter and the energy of the rays.