What is the primary characteristic of gamma rays?

Gamma rays are a type of high-energy electromagnetic radiation emitted during radioactive decay. One of their primary characteristics is their ability to penetrate various materials, including human tissue, lead, and concrete, to a significant extent compared to other forms of radiation, such as alpha and beta particles. This penetrating power is due to their short wavelength and high energy, which allows them to pass through matter rather than being easily absorbed or deflected.

This high penetrative ability makes gamma rays useful in several applications, including medical treatments like cancer radiotherapy and in imaging techniques such as PET scans. Understanding this property is crucial when discussing safety protocols in environments where gamma radiation is present, as it requires careful consideration of shielding and protective equipment to minimize exposure.

In contrast, low energy waves do not possess sufficient energy to penetrate materials effectively, and gamma rays are not visible to the human eye. Additionally, their speed is not slower than sound; in fact, they travel at the speed of light, much faster than sound waves.