Radiation is a general term referring to any sort of energy that can travel through space either as a wave or a particle.

Everyone is exposed to background radiation from natural sources such as soil, rocks and stones. Even water and certain foods,including nuts, bananas and potatoes, contain small traces of radiation.

However, as background radiation occurs in low levels, it's very unlikely to cause health problems.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 4 Jan 2017