4 янв 1896 г. - Henri Becquerel
Описание:
He left some uranium salt on a photographic plate accidentaly. He later found out the film was exposed and in contact with the salt. He thought the salt gave off invisable energy he called radiation.Добавлено на ленту времени:
Дата:
4 янв 1896 г.
Сейчас
~ 129 г назад