In this experiment you will explore the penetrating power of different types of radiation. A Geiger counter is used to measure the radiation coming from four different radioactive sources, which can be selected by rotating a turntable. A second turntable can be used to place four different types of absorbers between the radioactive source and the detector.

	Look at the role radiation plays in society.
	Spin the turntables, and discover the penetrating power of radiation.
	Why do different types of radiation have different penetrating power?
	What does the KGB have to do with alpha radiation?
	Test your knowledge!

The further you are away from a radioactive source, the better! This experiment will demonstrate how the amount of radiation decreases with increasing distance from the source. A Geiger counter is used to measure the radiation coming from a real radiation source at a distance selected by you.

	How close can you get to a nuclear accident?
	Measure how radiation from a real radioactive source changes with distance.
	Why radiation changes with distance even if it travels in a straight line and doesn't slow down??
	The physics demonstration that went horribly wrong.
	Test your knowledge!