| Themes > Science > Physics > Nuclear Physics > ABC's of Nuclear Science > Cosmic Rays > Cosmic Ray Exercise |
Turn on the Geiger counter. Use the most sensitive scale. Make sure that no radioactive material is nearby. What do you hear? Every few seconds, you will hear some beeps from the counter. Some of these counts are caused by cosmic rays. Surround the counter by some concrete or iron. Do the counts go away? Take the Geiger counter to a mountain such as Mount Diablo or Mount Tamalpias. Can you measure an increase in rate? It might be necessary to make measurements for five to ten minutes or more to achieve sufficient statistical accuracy. |
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