Fluorescence and x rays
This presentation is the property of its rightful owner.
Sponsored Links
1 / 14

Fluorescence and X rays PowerPoint PPT Presentation


  • 80 Views
  • Uploaded on
  • Presentation posted in: General

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

Download Presentation

Fluorescence and X rays

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Fluorescence and x rays

Fluorescence and X rays

Physics 3AB

Mr. D. Patterson


Outcomes

Outcomes

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


Relevance of fluorescence and x rays

Relevance of fluorescence and X-rays


Bohr s model

Bohr’s model

HYDROGEN


Fluorescence

Fluorescence

  • Ways to emit light from atoms in a gas:

    • Heat it up

    • Apply an electric current

    • Hit it with light or other EMR


Fluorescence1

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


Fluorescent lights

Fluorescent lights


Whiter whites with fluorescence

Whiter whites with fluorescence


X rays

X-rays

  • X-rays are very high energy EMR that have high frequency and good penetrating ability

  • Frequency is between 1017 and 1019 Hz


Penetrating ability of x rays

Penetrating ability of X-rays

X-rays penetration ability is proportional to density

Source

Detector


Dangers of x rays

Dangers of X-rays

They have the ability to ionise atoms

Can cause cancerous cell growth through damaging DNA


X ray production

X-ray production

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


Fluorescence and x rays

Slowing down the electron

Ionising inner electrons


X ray spectrum

X-ray spectrum

Continuous spectra and line emission spectra superimposed

Characteristic peaks

depend on target metal


  • Login