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Fluorescence and X rays

Fluorescence and X rays. Physics 3AB Mr. D. Patterson. Outcomes. explain fluorescence and the generation of X-rays—this includes applying the relationships :. Relevance of fluorescence and X-rays. Bohr’s model. HYDROGEN. Fluorescence. Ways to emit light from atoms in a gas: Heat it up

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Fluorescence and X rays

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  1. Fluorescence and X rays Physics 3AB Mr. D. Patterson

  2. Outcomes explain fluorescence and the generation of X-rays—this includes applying the relationships:

  3. Relevance of fluorescence and X-rays

  4. Bohr’s model HYDROGEN

  5. Fluorescence • Ways to emit light from atoms in a gas: • Heat it up • Apply an electric current • Hit it with light or other EMR

  6. Fluorescence • Fluorescence is the emission of light caused by the absorption of EMR • Wavelengths are equal or longer than incident EMR • Energy is less or equal to incident EMR

  7. Fluorescent lights

  8. Whiter whites with fluorescence

  9. X-rays • X-rays are very high energy EMR that have high frequency and good penetrating ability • Frequency is between 1017 and 1019 Hz

  10. Penetrating ability of X-rays X-rays penetration ability is proportional to density Source Detector

  11. Dangers of X-rays They have the ability to ionise atoms Can cause cancerous cell growth through damaging DNA

  12. X-ray production X-rays are produced by fast moving electrons suddenly losing their kinetic energy, releasing photons (X-rays)

  13. Slowing down the electron Ionising inner electrons

  14. X-ray spectrum Continuous spectra and line emission spectra superimposed Characteristic peaks depend on target metal

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