A Friend Produces a Geiger Counter to Check the Local

Multiple Choice

A friend produces a Geiger counter to check the local background radiation.It ticks.Another friend,who normally fears most that which is understood least,makes an effort to keep away from the region of the Geiger counter and looks to you for advice.What do you say?

A) Run away as fast as you can!
B) The Geiger counter is emitting radiation.
C) The Geiger counter is detecting naturally occurring radiation from your body.
D) Wear heavy clothes.