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Exploring Wave Nature of Sound and Light
- 1. 1. Complete Warm-Up for April 9th. Work with your shoulder partner first. Then swap and compare answers with the rest of your team. 4/9/12 2. The team with the most correct answers are “King/Queen for the day” and the D. Goldsberry rolling chairs. 3. Get your journal ready. Add one page of guided notes to the next available page. 4. Time Limit: 8 minutes
- 2. S8P5: Students will explore the 4/9/12 wave nature of sound and D. Goldsberry electromagnetic radiation.
- 3. How can light and 4/9/12 sound be used as D. Goldsberry tools?
- 4. D. Goldsberry 4/9/12
- 5. Echolocation is the use of reflected sound waves to determine distances or to locate objects. Some animals 4/9/12 use echolocation to navigate and to find food. Examples of animals D. Goldsberry using echolocation would include bats, dolphins, porpoises, and whales.
- 6. D. Goldsberry 4/9/12
- 7. Sonar is a system that uses reflected sound waves to detect 4/9/12 and locate objects under water. Some uses of sonar includes D. Goldsberry mapping the ocean floor and locating sunken ships
- 8. Ultrasound waves can be sent into the human body. Different parts of the body reflect sound waves differently. 4/9/12 The reflected waves are collected by D. Goldsberry a computer. The resulting images can be used to see the image a fetus, to look for gallstones, and to look for harmful tumors.
- 9. D. Goldsberry 4/9/12
- 10. 1.Break up kidney stones or gall 4/9/12 stones D. Goldsberry 2.Clean jewelry, glassware, or medical equipment
- 11. D. Goldsberry 4/9/12
- 12. Is this what you think of when I say the word „laser‟? 4/9/12 D. Goldsberry
- 13. ight mplification of = strengthened 4/9/12 timulated (atoms emit light when exposed to D. Goldsberry electromagnetic radiation) mmision of adiation
- 14. Characteristics of Laser light •Laser light consists of light waves that all have the same 4/9/12 wavelength or color. D. Goldsberry (monochromatic)
- 15. Characteristics of Laser light The waves are coherent. (It is “organized” -- each photon moves in step with the others.) 4/9/12 All of the crests of the waves D. Goldsberry align with one another.
- 16. D. Goldsberry 4/9/12
- 17. Production of Laser light Lasers can be made from gases, liquids, and solids. Laser medium is placed in a tube with 4/9/12 a mirror at one end and a partial mirror at the other end. D. Goldsberry
- 18. Production of Laser light The medium is “excited or charged” by an electric current. Excited atoms give off photons. 4/9/12 The photons bump into other atoms which then give off D. Goldsberry photons “in sync” with the colliding photons.
- 19. Production of Laser light When photons travel back and forth between the two mirrors until a coherent beam passes 4/9/12 through the partial mirror. D. Goldsberry
- 20. D. Goldsberry 4/9/12
- 21. Cutting tool in industry 4/9/12 D. Goldsberry
- 22. Cutting tool in surgery – seals off blood vessels 4/9/12 D. Goldsberry
- 23. Remove cataracts and repair the retina Correct vision by changing the shape of the cornea 4/9/12 D. Goldsberry
- 24. D. Goldsberry 4/9/12
- 25. Reading bar codes on packages Reading a CD or a CD-ROM 4/9/12 D. Goldsberry
- 26. D. Goldsberry 4/9/12
- 27. Create holograms D. Goldsberry 4/9/12
- 28. 4/9/12 Fiber Optics D. Goldsberry Communications
- 29. Light Tools: Other uses of EM Waves RADAR 4/9/12 D. Goldsberry Uses reflection
- 30. D. Goldsberry 4/9/12
- 31. Light Tools: Infrared detection 4/9/12 D. Goldsberry
- 32. D. Goldsberry 4/9/12
- 33. D. Goldsberry 4/9/12
- 34. Ultraviolet Waves Uses 1. disinfect medical equipment 2. detect forged bank notes 4/9/12 D. Goldsberry
- 35. Today‟s Closing Activity… Work with your shoulder partner to 4/9/12 complete “Joking Around”. Your correct D. Goldsberry answers will give you the response to the joke.