26.1 - Discovery of Radioactivity Flashcards
1
Q
When and how was ionising radiation discovered?
A
In 1896, by French scientist Henri Becquerel
2
Q
What did Becquerel notice?
A
That uranium salts affected a photographic plate, despite it being covered by black paper
3
Q
What did Becquerel show?
A
That the rays emitted from the uranium caused gases to ionise and that they could be deflected by a strong magnetic field
