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Notes pb lab 06 part 1 the spactacular spectrum

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Notes pb lab 06 part 1 the spactacular spectrum

  1. 1. The Spectacular SpectrumUnderstanding the Electromagnetic Spectrum
  2. 2. Key Objectives:Key Objectives:The student will:– investigate and understandthe nature and applications ofelectromagnetic waves
  3. 3. Key Objectives:Key Objectives:The student will:– Compare various types ofwaves in the electromagneticspectrum in terms ofwavelength, frequency andenergy
  4. 4. Key Objectives:Key Objectives:The student will :– Describe everydayapplications of each of themajor forms ofelectromagnetic radiation
  5. 5. Key Objectives:Key Objectives:The student will :– Recognize thatelectromagnetic waves are aform of radiant energy notrequiring a medium to travel
  6. 6. Key TermsKey TermsElectromagneticSpectrumElectromagneticWavesMicrowavesInfrared WavesVisible lightUltraviolet LightX-RaysGamma Rays
  7. 7. Electromagnetic Waves
  8. 8. Electromagnetic SpectrumThis electromagnetic spectrum(EMS) is the radiant energyreleased from the sun.
  9. 9. Electromagnetic SpectrumIt travels at the speed of lightthrough space and includes alltypes of electromagnetic waves
  10. 10. Electromagnetic Spectrum
  11. 11. Electromagnetic SpectrumThere are seven types ofelectromagnetic waves in theEMSRadio WavesMicrowavesInfrared WavesVisible Light WavesUltraviolet WavesX-RaysGamma Rays
  12. 12. Radio Waves
  13. 13. Radio Waves The electromagneticwaves with thelowest frequency. Used to transmitradio and televisionsignals (BeforeDigital TV) The largest bandmaking 20 %20 % of theEMS
  14. 14. Microwaves
  15. 15. Microwaves The secondfrequency level of theEMS. Used to send cellphone signals and tocook food Make up 15%15% of theEMS
  16. 16. Infrared waves
  17. 17. Infrared waves The level just beneathvisible light. It measures heat as itreflects off objects. Night vision gogglesuse it to see objects intotal darkness. Make up 13%13% of theEMS
  18. 18. Visible light The smallestsection about9%9% of the EMS. It allows us tosee. ROYGBIV
  19. 19. The Visible Light Spectrum(Wavelengths)
  20. 20. Ultraviolet Light Means above violet light on thevisible light spectrum so itcannot be seen. Makes up 12% of theEMS If unprotected itmay cause:– sunburn– skin cancer
  21. 21. X-Rays Make up 16%16% of the totalEMS X-Rays can passthrough manysubstances. Lead is one of a fewsubstances that preventthe transfer of X-Rays
  22. 22. X-Ray of Hands
  23. 23. Gamma Rays The highest frequency of the EMS. Makingup 15%15% of the EMS, Very dangerous butstill can be used for cancer cures.
  24. 24. 20%15%13%9%12%16%15%The E.M.S.
  25. 25. Lab Time Carefully read andcomplete eachactivity from the labguide. You have 45minutes
  26. 26. Essential LearningsAll Electromagnetic wavesoriginally come from the sun
  27. 27. Essential LearningsAll electromagnetic waves arearranged on the electromagneticspectrum by wavelength andfrequency
  28. 28. Essential LearningsThe Electromagnetic Spectrumincludes seven different types of waves– Radio Waves– Microwaves– Infrared Waves– Visible Light– Ultraviolet Light– X-Rays– Gamma rays
  29. 29. Essential LearningsRadio waves are the lowestenergy level w/ lowestfrequency and have the longestwavelength
  30. 30. Essential LearningsGamma rays are the highestlevel w/ highest frequency andthe shortest wavelength
  31. 31. Essential LearningsAll types of electromagneticradiation travel at the speed oflight in space (which is avacuum).They differ at wavelengths andfrequencies
  32. 32. Essential LearningsElectromagnetic Radiationtravels as transverse wavesand does not require a mediumin which to travel
  33. 33. Essential LearningsThe End!