More on EM waves 2
- Created by: alexda
- Created on: 17-05-14 20:14
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- More on the Electromagnetic spectrum
- 5. X-rays
- Airport security to scan luggage.
- Airports use x-ray scanners on passengers for any concealed weapons or explosives.
- Used in hospitals to take photographs to check for broken bones.
- X-rays pass easily through flesh but not so easily through denser material like bones or metal.
- 6. Gamma rays
- Sterilisation of medical tools.
- High doses of gamma rays kill harmful microbes in food.
- Gamma rays can also be used to diagnose cancer.
- High doses of gamma rays kill all living cells, so it can be used to treat cancers.
- However a fair bit of damage can be done to normal cells. But if the cancer is killed successfully in the end, its worth it.
- Ionising radiation is emitted all the time by radioactive source when their nucleus decays: alpha,beta, gamma.
- They have so much energy they knock electrons off atoms.
- 5. X-rays
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