BENDING LIGHT – REFRACTION

HOW DOES LIGHT BEND WHEN IT CHANGES SPEED? CAN YOU USE THE REFRACTION OF LIGHT TO DO “MAGIC” TRICKS? HOW CAN REFRACTION BE USEFUL TO PEOPLE?

 

This lesson has both qualitative and quantitative activities, each lasting about one hour.


MATERIALS (Details in teacher notes below)

Activity 1 – Can You Bend Light?

  1. Pen and paper, ruler, laser pointer, slab of stiff gelatin (or polished acrylic block if available), a non-serrated knife or a smooth, thin piece of plastic for cutting gelatin.

Activity 2 – Magic Coin!

  1. Cup, penny, water

Activity 3 – The Disappearing Beaker!

  1. A small Pyrex beaker or test tube, a larger transparent glass or beaker to hold the small one, vegetable oil. Alternate: clear glass of water with a few gel beads (used for arranging flowers)

Activity 4 – Lenses

  1. Stiff gelatin, round cookie cutter or flexible plastic strip for cutting, laser pointer

Activity 5 – Optical Fiber

  1. Stiff gelatin, knife or plastic strip for cutting, laser pointer

Activity 6 – Lighting Without Electricity

  1. (Depending on design) Carton, water bottle, flashlight


OPTIONAL ACTIVITY: The Weird Lens. See teacher notes for details.


Rev 1/22/17

STUDENT INSTRUCTIONS AND TEACHER NOTES


Bending_Light-Refraction_Slides.pptx.zip  (PowerPoint slides with student instructions)


Bending_Light-Refraction_Teacher_Notes.pdf


Bending_Light-Refraction_Observations.pdf  (Student data and observations)


VIDEO: Gelatin Optics


VIDEO: The Disappearing Beaker


VIDEO: The Magic Lens