Observation, Observing, Universe, Electromagnetic Radiation.
for example, by a growing tree. As a result, wood initially contains a well defined ratio of 14 C and 12 C in its makeup. However, 14 C is radioactive, having a half-life of 5730 years, with 14 C decaying to form 14 N with an electron and an antineutrino. The ratio of 14 C to 12 C will thus