Curated OER
Radioactive Isotopes
A Geiger counter is used to detect emission of alpha particles, beta particles, and gamma rays. The teacher experiments to find out which materials block each of these forms of radiation. The camera is focused on the measuring instrument...
Crash Course
Crash Course History of Science #31: Marie Curie and Spooky Rays
It's time to talk about one of the most awesome scientists: Marie Curie. She figured out ways to get an education despite limitations of her homeland, was the first woman to win a Nobel Prize, and was the first person to win two Nobel...