Physics+20B

__**May 16, 2011**__ - Defined the following terms: luminous, non-luminous, ray, beam, incandescent - Challenge: How many times can you make a laser pointer bounce off a mirror - Finished booklet questions 5 to 13. Due for tomorrow __**May 13, 2011**__ - Intro to light - concept map on board - Define: rectinlinear propagation, opague, transparent and transluecent - Found three objects: 1 opague, 1 transparent and 1 transluecent. Record in notes how light behaves when it enters each type. - Started light textbook reading and questions. #1 to 4 are due for Monday. __**May 12, 2011**__ Sound Exam __**May 11, 2011**__ Doppler Effect Video

media type="youtube" key="imoxDcn2Sgo" height="349" width="425" media type="youtube" key="Man9ulEYSgk" height="349" width="425" __**May 10, 2011**__ Sound Wave Simulator 1) Open the following website: [] 2) Download or run the simulation 3) View tab "Listen to a single source". Make sure audio is enabled. Record what happens to the sound when you change the frequency and when you change the amplitude. 4) View tab "Measure." Measure the speed of sound and record the value. 5) View tab "Two source interference". Vary the amplitude and frequency and record what happens. Draw the pattern produced in your notes. Move the man (click and drag him) and record how the sound changes as you pass through the pattern. 6) View tab "Interference by Reflection". Record what happens when a 2-D sound wave hits a barrier at an angle and straight on. Do you hear the sound waves interfering? 7) View tab "Listen with varying air pressure". Record what happens when air pressure is removed from the box.

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__**Unit Three - Sound**__ || || || ||
 * Class Notes/Handouts || [[file:The Human Ear.doc]]
 * PowerPoints || [[file:Characteristics_of_Sound.pptx]]
 * Labs/Activities || [[file:Sound Module 1.doc]]
 * Rubrics/Answer Keys || [[file:P20 Strings Answer Key.docx]]