Radiation within the visible spectrum can appear black if it is low in power – more specifically, lower in power than its ...

All types of radiation become less intense as they travel further away from the radioactive material. This is because the particles or rays become more spread out. The thicker the substance ...

It is normally emitted alongside alpha or beta radiation. Gamma ray emission causes no change in the number of particles in the nucleus meaning both the atomic number and mass number remain the same.