Physics

Physics

1. Radio-activity

   • infrared
     • emmisions from electromagnetic waves
   • heat
     • body heat

2. sources of radiation

   • medicine
   • smoke detectors
   • radiotherapy
   • steralisation

3. effects of radiation

   • harms living cells

4. alpha, beta and gamma

   • gamma
     • no mass or charge
     • weakly ionisng
     • penetrate far materials
   • beta
     • fast n small
     • moderately ionising
     • mid section between alpha n gamma
   • alpha
     • helium nuclei
     • two nuetrons +protons
     • big heavy slow moving
     • strongly ionising