1. Quiz quiz swap

2. C/W 1 st October 2011 Recap - Effects of ionising radiation Keywords: gamma rays radioactive X-rays radiographer Objectives: Must – Understand the risk of using x- rays and gamma rays Should – understand the precautions you need to take with x-rays and gamma rays. Could – Understand risk, and perceived risk

3. Electromagnetic Spectrum Radio Micro Infra-Red Light Ultra-Violet X rays Gamma Wavelength ( ) increases Can you think of a phrase that would help you remember this order? Gate X Usually Lets In Most Radiation High frequency Short wavelength High energy Most penetrating High frequency Short wavelength High energy Most penetrating Low frequency Long wavelength Low energy Least penetrating Low frequency Long wavelength Low energy Least penetrating x

4. There is radiation around us a lot of the time......Is this a problem?

5. CT scan (computer tomography) (drawing a map of your insides!) This uses x-rays What are the problems? What are the benefits? Is it worth it?

6. C/W 2 nd November 2011 Microwaves Keywords: absorb microwave sample bias Objectives: Must – Understand the heating effects of radiation can damage cells Should – Know what microwaves can be used for. Could – Understand how risks can be assessed.

7. Microwaves transfer energy when absorbed by water, They transfer less energy than x-ray or gamma rays. They still heat though because: 1)They are very intense 2)The radiation is absorbed for a long time.

8. HH o

9. We saw last week we can think of light as little packets of energy called photons.......

10. How microwave works clip

11. Mobile phones also use microwaves to send information These don’t heat your head so much, as they are less intense There is no clear link yet between mobile phone use and cancer

13. Why are sun beds going to be banned?

14. C/W 2 nd November 2011 Microwaves Keywords: absorb microwave sample bias Objectives: Must – Understand the heating effects of radiation can damage cells Should – Know what microwaves can be used for. Could – Understand how risks can be assessed.