Conceptual Physics Alive: Reflection and Refraction

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Master teacher Paul Hewitt teaches concepts on Reflection and Refraction. Total internal reflection and light dispersion are also discussed.

Please note: The digital content will be sent to the email provided during checkout, once your order has been processed. Order will be processed no later than the next business day.
Digital format: The email you will receive will contain a hyperlink to download a .ZIP file containing a digital video (.MP4) and questions set with answers (.PDF).
Notice: This digital content can be used in physical or remote classroom settings (e.g., Google Classroom, Canvas, etc.), or Homeschool. Replicating and distributing this digital content for profit without the authority of the copyright owner is an infringement of the copyright.

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Additional Details

Conceptual Physics Alive: Reflection and Refraction includes a digital video and questions set with answers.

Observe Paul Hewitt teach in a classroom with real students, using engaging demonstrations and artwork. In this video, mirrored and diffuse reflection are compared. Refraction is demonstrated using a water tank. The concepts of total internal reflection and light dispersion are discussed, leading to a demonstration of properties of a rainbow. Segment length: 41 minutes

Reflection and Refraction Includes:

  • Hewitt begins with the game 'Fermat's Principle of Least Time' (which is in the college edition of Conceptual Physics, but not in the high school version).
  • The principle of reflection; the angle of incidence equals the angle of reflection.
  • Diffuse reflection for rough surfaces.
  • On the chalkboard, Hewitt draws a candle in front of a mirror and sample light rays to illustrate the law of reflection.
  • Refraction is illustrated on the chalkboard by Fermat's principle of least time, and the case is given of a lifeguard wanting to save someone in distress in the water the path of shortest time is not necessarily a straight line.
  • Refraction and changes in light speed when going from one medium to another.
  • Demonstration of wheels rolled down an inclined plane that bend when they roll from a smooth surface to a rough surface.
  • Chalkboard sketch of wheel action, and how light similarly bends in going from air to water.
  • Demonstration of the refraction of "root beer" poured in a mug.
  • Hewitt tells of seeing a bottle of Coke embedded in plastic where very little refraction occurred. This allowed a 'truer" view of the amount of Coke in the bottle.
  • Demonstration (Hewitt's first!) in response to a student question. A tank of water is produced and the 'Coke bottle' phenomenon is nicely displayed.
  • Demonstration of refraction of a laser beam in water.
  • Hewitt suggests an experiment in the bathtub wherein a flashlight is tipped upward to reach the critical angle.
  • Critical angle of light in water.
  • Fiber optics, and the hair of polar bears.
  • Rainbows and prisms.
  • Demonstration of the rainbow's bow shape with a set of sticks that simulate light rays.
  • Fisheye view of the sky.
  • Nearsightedness in water.

Next-Time Question: What is the minimum size of a plane mirror on the wall to see your full-length image? What effect does distance have on your answer? (SEE RESOURCES TAB FOR A SAMPLE OF QUESTIONS AND CLICK HERE FOR MORE)

Please note: The digital content will be sent to the email provided during checkout, once your order has been processed. Order will be processed no later than the next business day.

Digital format: The email you will receive will contain a hyperlink to download a .ZIP file containing a digital video (.MP4) and questions set with answers (.PDF).

NoticeThe Conceptual Physics Alive Digital content is protected by copyright laws. Replicating and distributing this digital content without the authority of the copyright owner is an infringement of the copyright. This digital content can be used in physical or remote classroom settings (e.g., Google Classroom, Canvas, etc.), or Homeschool.