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FAIR USE STATEMENT :

FAIR USE STATEMENT :

bernard-ross
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FAIR USE STATEMENT :

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  1. FAIR USE STATEMENT: Please feel free to edit and use this presentation in your classroom. Please do not remove the credit line on the title page or republish the file in whole or in part as your own. Please do not distribute the file to individuals or at conferences or workshops. I am more than willing to share the presentation with anyone that contacts me at rhondaa@cox-internet.com. The images used in the presentation are not original and the presentation is distributed freely but only for classroom instruction. Rhonda Alexander

  2. ELECTROMAGNETIC RADIATION Is a type of energy form that Exhibits wavelike behavior As it travels through space gamma X-ray Ultraviolet Curie visible infrared micro Einstein radio Planck de Brogelie

  3. Electromagnetic Radiation

  4. Excited State = High energy level Ground State = Lowest energy level

  5. wave

  6. Characteristics Crest Trough

  7. Electromagnetic Spectrum - is all the forms of electromagnetic radiation put together. Slide 17

  8. Characteristics Wavelength Distance between two peaks or troughs lambda λ Frequency Number of waves per second nu ν Speed of light, c 3.0 X 108 m/s

  9. Electromagnetic Calculations • E=energy (Joules, J) • c=speed of light 3.0*108m/s • h=Plank’s Constant 6.626*10-34Js • n=frequency (1/s or Hertz, Hz) • l=wavelength (m) E=hn c=ln

  10. 1 m= 109 nm or 10-9m = 1nm Relationship Speed of light = (Wavelength)(Frequency) The brilliant red colors seen in fireworks are due to the emission of light with wavelength around 650 nm when strontium salts are heated. Calculate the frequency of red light. l=650nm = 650*10-9 m c=3.0*108 m/s c=ln n=c/l n=3.0*108m/s/ 650*10-9 m n=4.62*1014 1/s

  11. Energy is quantized Energy is gained or lost in whole number ratios E= hn h=6.626 X 10-34 J . s Calculate the smallest increment of energy than an object can absorb from yellow light whose wavelength is 589 nm. l=589nm = 589*10-9 m c=3.0*108 m/s c=ln n=c/l n=3.0*108 m/s/ 589*10-9 m n=5.09*1014 1/s h=6.626*10-34 Js n=5.09*1014 1/s E=hn E=(6.626*10-34 Js)(5.09*1014 1/s) E=3.37*10-19J

  12. Types of Spectra Continuous Spectra All the colors of the rainbow Bright line spectra Only certain colors depends on electron motion

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