ThursdayThursdayFebruary 28February 28

Day 109Day 109 ScheduleSchedule

Wrap Up Waves TodayWrap Up Waves Today Pre-Quiz HWPre-Quiz HW Review TomorrowReview Tomorrow Unit Test MondayUnit Test Monday 25 Week MP Ends March 525 Week MP Ends March 5

TerminologyTerminology

Monochromatic LightMonochromatic Light Light Of A Single Color (Frequency)Light Of A Single Color (Frequency) Lasers Are MonochromaticLasers Are Monochromatic

Polychromatic LightPolychromatic Light Many Colors (Frequencies)Many Colors (Frequencies) Sunlight Appears “White” Because Of How Sunlight Appears “White” Because Of How

Our Eyes Respond To A Mixture Of Colors Our Eyes Respond To A Mixture Of Colors Across The Spectrum Of Visible LightAcross The Spectrum Of Visible Light

Light As A WaveLight As A Wave

In Our Final Unit Of The Year, We Will In Our Final Unit Of The Year, We Will Learn That Light Has Both WAVE Learn That Light Has Both WAVE PROPERTIES And PARTICLE PropertiesPROPERTIES And PARTICLE Properties

In Other Words, Sometimes Light Behaves In Other Words, Sometimes Light Behaves As A Wave, Sometimes As A ParticleAs A Wave, Sometimes As A Particle

In This Unit, We Have Only Considered In This Unit, We Have Only Considered The Wave PropertiesThe Wave Properties

Let’s SummarizeLet’s Summarize

Light As A WaveLight As A Wave Evidence That Light Behaves As A WaveEvidence That Light Behaves As A Wave

It Has A It Has A WavelengthWavelength We Can Measure We Can Measure Its Its FrequencyFrequency Can Be Measured Can Be Measured It It ReflectsReflects Like A Wave Like A Wave It It RefractsRefracts Like A Wave Like A Wave It It DiffractsDiffracts Like A Wave Like A Wave It Exhibits Constructive And Destructive It Exhibits Constructive And Destructive InterferenceInterference

It Can Be PolarizedIt Can Be Polarized

PolarizationPolarization

Recall This View Of An Electromagnetic Recall This View Of An Electromagnetic Wave, Such As A Light WaveWave, Such As A Light Wave

PolarizationPolarization

Most Light Sources Most Light Sources Are Not Light ThisAre Not Light This

They Normally Consist They Normally Consist of Waves In A Variety of Waves In A Variety of Orientationsof Orientations

This Is How They This Is How They Would Look In A Would Look In A Head-On and an Head-On and an Oblique ViewOblique View

PolarizationPolarization We Can Simplify This We Can Simplify This

Complex View Into A Complex View Into A Wave With Half Of Its Wave With Half Of Its Waves Oriented Waves Oriented Horizontally And Half Horizontally And Half VerticallyVertically

Here Is A Head-on Here Is A Head-on View Of Simplified View Of Simplified UNPOLARIZED LightUNPOLARIZED Light

PolarizationPolarization

When A Wave IS POLARIZED, One Of When A Wave IS POLARIZED, One Of The Orientations Is BlockedThe Orientations Is Blocked

One Material That Can Do This Is A One Material That Can Do This Is A Polaroid FilterPolaroid Filter

PolarizationPolarization

A Picket A Picket Fence Fence Analogy Can Analogy Can Be UsedBe Used

Polaroid MaterialPolaroid Material

Polarizing Sunglasses

Link To Animation

HomeworkHomework Waves Pre-QuizWaves Pre-Quiz

Pay Special Attention To Part II Questions Pay Special Attention To Part II Questions (#64-#80), Including Measuring and (#64-#80), Including Measuring and Constructing Reflected and Refracted RaysConstructing Reflected and Refracted Rays

Use Your Written NotesUse Your Written Notes Use Posted Class NotesUse Posted Class Notes

First Day Of Waves Was January 29First Day Of Waves Was January 29 Use Your Reference TablesUse Your Reference Tables