1. Radiation and YOU 

2. Non-ionizing Radiation
Electromagnetic radiation that transfers energy to matter without breaking bonds.
Examples:
Radio waves
Microwaves
Infrared
Visible Light

3. Non-ionizing Radiation
Affects atoms and molecules by:
Increasing the motion of the atom
Moving electrons to higher states in the atom.

4. Non-ionizing Radiation
Not harmful in low doses, but can cause burns at high doses.
Dose: the amount of radiation received.

5. Ionizing Radiation
Ionizing radiation carries enough energy to break bonds between atoms
Examples: ultraviolet, X-rays, gamma rays

6. Ionizing Radiation Affects atoms and molecules by:
Breaking chemical bonds
Freeing electrons and forming ions
Can damage cells and cellular machinery.

7. Ionizing Radiation and You!
Two major factors in tissue damage
Radiation density – how concentrated the radiation is
Dose – the total amount of radiation received

8. Factors affecting damage
Dose – the more radiation received, the more damage occurs.
Exposure time – The shorter the dose, the greater the damage.

9. Factors affecting damage
Area exposed: The greater the area of body exposed, the greater the damage.
Tissue type: Rapidly dividing cells receive more damage.