Which type of photons can pass through many kinds of materials, including human tissue?

Gamma photons are high-energy electromagnetic radiation that have very penetrating power. They can pass through a wide range of materials, including human tissue, because they possess sufficient energy to overcome the atomic structure of these materials. This capability allows gamma rays to penetrate dense substances, which makes them useful in medical imaging and cancer treatment but also necessitates caution due to their potential harmful effects on living tissues.

Alpha particles, on the other hand, have a much lower penetration ability due to their larger mass and positive charge. They can be stopped by a sheet of paper or even the outer layer of human skin. Beta particles, which are electrons or positrons, have a greater penetration potential than alpha particles but can still be blocked by materials like plastic or glass. In comparison, gamma photons are significantly more penetrative, making them stand out as the correct answer in this context.