Out of 60Co, deep therapy x-rays, 10 MV x-rays, and 10 MV electron, which will have the highest beam penetration?

The choice of 10 MV x-rays as having the highest beam penetration is grounded in the properties of photon interactions with matter. X-rays are electromagnetic waves, and their ability to penetrate materials largely depends on their energy.

In general, higher energy x-rays can penetrate deeper than lower energy x-rays. The term "10 MV" refers to the energy of the x-rays produced by linear accelerators, specifically 10 mega-electron volts. These high-energy x-rays have sufficient energy to traverse tissues and materials effectively, thus resulting in greater depth of penetration compared to lower energy x-rays or other forms of radiation.

In contrast, 60Co emits gamma radiation, which is high in energy but is typically used in a different context than therapeutic x-rays. Its penetration is less efficient than that of high-energy x-rays from a linear accelerator. Similarly, deep therapy x-rays, while higher than conventional x-rays, still represent a lower energy range than 10 MV x-rays, leading to less penetration capability.

10 MV electrons, while also effective in therapy, do not penetrate as deeply as x-rays because electrons are charged particles. They lose energy more rapidly in matter due to their interactions with electrons in the tissues, leading to a limited depth of penetration primarily suited