11_Feb 26_Lasers, colors

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Fluorescent lighting, effect on color perception, lasers fundamentals, reflection, refraction, total internal reflection

Formation Technologie Business

Today: Colors, Lasers, Reflection Energy efficient “ Compact Fluorescent” lighting

Which color star would be the hottest? ,[object Object],[object Object],[object Object],[object Object],[object Object]

To get glowing red light, peak radiation would be in infrared region Visible range

Clicker Question—Lighting efficiency ,[object Object],[object Object],[object Object],[object Object]

Clicker Question—Lighting efficiency ,[object Object],[object Object],[object Object],[object Object],Or using natural sunlight is even better! (though you could argue about “efficiency”) We will have a homework question this week to lead you through an explanation of why this is true

Homework problem introduction ,[object Object],[object Object],[object Object],Visible range Images:wikipedia

Color perception is a very complicated mixture of physics and physiology ,[object Object],[object Object],[object Object],http://www.gelighting.com/na/business_lighting/education_resources/learn_about_light/distribution_curves.htm GE Interactive color booth http://www.gelighting.com/na/business_lighting/education_resources/learn_about_light/color_lamp.htm Think of the acoustic parallel and a “synthesizer” DEMOS

Brainstorming--Lasers ,[object Object],[object Object],[object Object]

Lasers…important qualities ,[object Object],[object Object],[object Object],[object Object]

How does a laser work? First: http://www.colorado.edu/physics/PhysicsInitiative/Physics2000/lasers/lasers2.html

How does a laser work? ,[object Object],[object Object],[object Object],[object Object]

Laser pointers ,[object Object],[object Object],[object Object]

Light emitting diodes (LEDs) and Laser Diodes ,[object Object],[object Object],[object Object],First: what are solar cells? http://www.youtube.com/watch?v=napVP6jAZxM&feature=related

$Next we’ll start talking about reflection and refraction http://www.youtube.com/watch?v=_6LsXA_FJIE&feature=related A really fun introduction to the subject! The archer fish$

Clicker Question—Reflection ,[object Object],A B C

Clicker Question—Reflection ,[object Object],A B C Reflection: Angle of reflection = angle of incidence

Clicker Question ,[object Object],A B C Air Diamond

$Clicker Question -- Refraction ,[object Object],A B C Air Diamond Reflection: Angle of reflection = angle of incidence Refraction: Imagine the wave as a two wheeled cart encountering a boundary$

Total internal reflection ,[object Object],Air glass “ Evanescent” Wave Total internal reflection Total internal reflection a key to fiber optics! -> demo

TIR enables a special surface microscopy technique Air glass “ Evanescent” Wave Excite fluorescence in cell with evanescent wave www.olympusamerica.com Red = TIRF Green = regular

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11_Feb 26_Lasers, colors

1. Today: Colors, Lasers, Reflection Energy efficient “ Compact Fluorescent” lighting

2. Quiz 4

5. To get glowing red light, peak radiation would be in infrared region Visible range

10.

11.

12. How does a laser work? First: http://www.colorado.edu/physics/PhysicsInitiative/Physics2000/lasers/lasers2.html

13.

14.

15.

16.

17. Next we’ll start talking about reflection and refraction http://www.youtube.com/watch?v=_6LsXA_FJIE&feature=related A really fun introduction to the subject! The archer fish

18.

19.

20.

21.

22.

23. TIR enables a special surface microscopy technique Air glass “ Evanescent” Wave Excite fluorescence in cell with evanescent wave www.olympusamerica.com Red = TIRF Green = regular