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University of Alberta Lib rai 0 1 620 3415589 3 Distance Learning ■jiiiai EDUCATION Digitized by the Internet Archive in 2017 with funding from University of Alberta Libraries https://archive.org/details/physics2006albe IT IS STRICTLY PROHIBITED TO COPY ANY PART OF THESE MATERIALS UNDER THE TERMS OF A L ICENCE FROM A C OLLECTIVE OR A L ICENSING BODY. This document is intended for Students / s Teachers (Physics 20) Administrators Parents General Public Other Physics 20 Student Module Module 6 Light as a W ave Alberta Distance Learning Centre ISBN No. 0-7741-0836-3 Cover Photo: WESTFILE INC. ALL RIGHTS RESERVED Copyright ® 1 993, the Crown in Right of Alberta, as represented by the Minister of Education, Alberta Education, 11160 Jasper Avenue, Edmonton, Alberta, T5K 0L2. All rights reserved. Additional copies may be obtained from the Learning Resources Distributing Centre. No part of this courseware may be reproduced in any form, including photocopying (unless otherwise indicated), without the written permission of Alberta Education. Every effort has been made both to provide proper acknowledgement of the original source and to comply with copyright law. If cases are identified where this has not been done, please notify Alberta Education so appropriate corrective action can be taken. UNIVERSITY LIBRARY UNIVERSITY DF Ai RFQTfc We hope you'll enjoy your study of Light as a i| Wave. To make your learning a b it easier, watch the referenced videocassettes whenever you see this icon. You also have the option of viewing laser videodisc clips when you see the bar codes like this one. Frame 48350A When you see this icon, study the appropriate pages in P»H»Y»S»I*C*S your textbook. | MERRILL PRWCPLE8 AMD PROBLEMS Good Luck! Course Overview This course contains eight modules. The first four modules involve the study of motion on Earth and in the heavens. Modules 5, 6, and 7 i nvestigate the properties and characteristics of waves in general and light waves. The last module is an introduction to nuclear physics from the point of view of risk/benefit analysis. The module you are working in is highlighted in darker colour. Table of Contents Overview 1 Evaluation 2 Section 1 : How Light Travels and Reflects 3 Activity 1 : History of Models for Light 4 Activity 2: Propagation: Straight as an Arrow..... 6 Activity 3: Propagation: Faster than a Speeding Bullet 9 Activity 4: Reflection from Flat Surfaces 11 Follow-up Activities 15 Extra Help 15 Enrichment 16 Conclusion 19 Assignment 19 Section 2: Refraction, Colour, and Polarization 20 Activity 1 : Refraction of Light 21 Activity 2: Snell's Law 31 Activity 3: Dispersion and Colour of Light 44 Activity 4: Polarization of Light 47 Follow-up Activities 50 Extra Help 51 Enrichment 53 Conclusion 53 Assignment 53 Table of Contents Continued Section 3: Images in Your Life Activity 1: Images in Plane Mirrors .. Activity 2: Total Internal Reflection Activity 3: Optical Illusions Due to Refraction Follow-up Activities Extra Help Enrichment Conclusion Assignment Module Summary Appendix OVERVIEW In previous science courses you studied the various forms of energy and learned how they could be transformed from one form to another. You also discovered that light is j ust another form of energy. Can you imagine what life would be like without light energy? Could you see? Could you live? The basic processes of life depend on light energy and photosynthesis. Your sense of sight and your ability to see colour rely directly on light energy. Light energy also makes you feel good - y ou usually are in a b etter mood on a b right and sunny day than on a d ark and cloudy day. In this module you will learn about the properties of light. You will explore the reflection and refraction of light and learn how reflection and refraction apply to your life. Module 6: Light as a W ave Physics 20 1 Evaluation Your mark in this module will be determined by your work in the Assignment Booklet. You must complete all assignments. In this module you are expected to complete three section assignments. The mark distribution is as follows: Section 1 A ssignment 35 marks Section 2 A ssignment 43 marks 22 marks Section 3 A ssignment TOTAL 100 marks