4h 48min, jan 1, 7 y - Ernest Rutherford
Description:
A physicist originally from New Zealand but working in Canada, investigates Becquerel's "uranic rays" and discovers that they are in fact a mixture of two components: a very heavy component which is easily absorbed by matter and has a positive charge; and a much lighter, more penetrating component which is not so easily absorbed and has a negative charge. Rutherford calls these components a and b, after the first two letters of the Greek alphabet.Added to timeline:
Date:
4h 48min, jan 1, 7 y
Now
~ 2019 years ago