Amy.d!!!

**__ηυ¢ℓєαя яα∂ιαтιση__**
Radioactive materials always give out nucleaur radiation. Until the invention of photographic film, nobody reallyknew about that radioactivy existed and this was discoverd only about 100 years ago!! This was descoverd by Henri Becquerel in 1896.



^ ^ Radiotherapy ^ ^



^ Henri Bacquerel ^

You may not know but you are surrounded by background radiation all the time! These include: - Cosmic rays [ fast moving particles ] - Radon [ radioactive gas given from soil and rocks ] - you food, drinks and other living things