Electromagnetic Spectrum

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* List some Greek symbols and their meanings:
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Presentation transcript:

Electromagnetic Spectrum

Why do we fear radiation?

Radioactive atom

Radioactive atom A material that spontaneously emits radiation —alpha particles, beta particles, and gamma rays

 +  

A helium atom 2 protons and 2 neutrons

An electron

Energy

Complete the following table alpha beta gamma few cm of air sheet of paper thin aluminium human skin reduced by thick concrete or lead symbol Can penetrate…… γ  

reduced by thick concrete or lead Penetration alpha beta gamma few cm of air sheet of paper thin aluminium human skin reduced by thick concrete or lead symbol Can penetrate……  γ x  

Alpha Beta Gamma Aluminium Lead Paper

Penetrating Power Radiation Structure Size Charge   

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