Learning Objective To be able to: Describe the effects of exposure to electromagnetic waves Key Words: Sieverts, tissue, radiation.

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Presentation transcript:

Learning Objective To be able to: Describe the effects of exposure to electromagnetic waves Key Words: Sieverts, tissue, radiation

Harmful effects of the EM Spectrum Monday, 20 May 2019 Harmful effects of the EM Spectrum Date and title in books. You need a pen, pencil & ruler. Starter Activity – 5 minutes Exam question

(F) Target 1-9 Identify why waves from the EM spectrum can be damaging (F/H) Target 4-9 Describe the effects of X-rays, UV and gamma rays on the body (H) Target 5-9 Explain the short term and long term effects of exposure Extension: Application of Knowledge Target 8/9 Explain why dosimeters are used by radiographers Learning Outcomes

Radiation Dose The more radiation we are exposed to, the greater the effects. Small doses are all around us, they cause us little harm. We measure radiation dose in Sieverts (Sv).

UV - Effects of the body UV rays are used for tanning What might the effects of too many UV rays on the body be? Premature aging of the skin Skin cancer

X-rays and Gamma Rays - Effects of the body X-Rays and Gamma rays are ionising. This means they can change living cells What might the effects of too many X-rays and gamma rays on the body be? Mutations of genes Cancer