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Electromagnetic Waves

Electromagnetic Waves. Mr. Boyle Chatfield Senior High. Speed of Light. The speed of light (variable c ) is 3 X 10 8 m/s . This is true for the whole electromagnetic spectrum. ROY G BIV. Usin g a Cl assro om P roject or to Stu dy th e Pro perti es of L ight.

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Electromagnetic Waves

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  1. ElectromagneticWaves Mr. Boyle Chatfield Senior High

  2. Speed of Light • The speed of light (variable c) is 3 X 10 8m/s. This is true for the whole electromagnetic spectrum.

  3. ROY G BIV

  4. Using a Classroom ProjectortoStudythePropertiesofLight Drs. Michael Ottinger and Brian BuckleinMissouri Western State UniversitySt Joseph, MO 64507 Missouri Association of Physics Teachers MeetingNovember 6, 2010

  5. Three Color Image System Red Lamp Red Image Superimpose Images Blue Lamp Blue Image Green Lamp Green Image

  6. Breaking down the Colors • The following slides were made by using the “Shapes” drop down in PowerPoint to make two thin rectangular lines. • The top line was set to white and, using the color setting the bottom line was set to different color combinations.

  7. Please put on your spectral glasses

  8. White

  9. Red

  10. Green

  11. Blue

  12. Yellow =Red+Green

  13. Magenta=Red+Blue

  14. Cyan=Green+Blue

  15. White=Red+Blue + Green

  16. You may remove your spectral glasses

  17. What I look like RGB lamp

  18. What color looks like under Sodium Lamp…

  19. A question • Winnie the Pooh (the yellow skinned bear) is placed under red light. How will he appear?

  20. The answer

  21. Other colors…

  22. Other colors…

  23. Other colors…

  24. Other colors….

  25. Other colors…

  26. Me under infrared light

  27. Intensity of Light • Transparent • Light Completely passes through (Glass, transparency Translucent Light partially passes through (frosted glass) Opaque Light completely blocked.

  28. Reflection of Light • Mirrors…

  29. Inverse Square Law of Light

  30. Microwaves (High wavelength) • Used for communication and to cook food. • Microwaves work by resonating water molecules. • Do not put foil in the microwave!

  31. Light is a Particle? • Radiometer

  32. A demonstration

  33. Light is a wave • Polarization

  34. Polarization of Projector Light

  35. Diffraction • A wave property of light…

  36. Light • A discrete quantity of energy…. • It is both a wave and a particle…

  37. Laser • Light Amplification by Stimulated Emission of Radiation…

  38. Hologram • An object beam interferes with an image beam…

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