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RAIN BOW
The hidden beauty of the rainbow
Radius?	
  	
  	
  	
  20°,	
  30°,	
  42°,	
  50°	
  
                                	
  
Color sequence? redàblue	
  or	
  blueàred	
  
                                	
  
 Inside the bow is brighter or darker?
                                	
  
 How many bows can you see? 1,	
  2	
  ,3…	
  
                                	
  
 Is the bow light polarized?_________	
  
Radius?	
  	
  	
  	
  20°,	
  30°,	
  42°,	
  50°	
  
                                	
  
Color sequence? redàblue	
  or	
  blueàred	
  
                                	
  
 Inside the bow is brighter or darker?
                                	
  
 How many bows can you see? 1,	
  2	
  ,3…	
  
                                	
  
 Is the bow light polarized?_________	
  
The hidden beauty of the rainbow
The hidden beauty of the rainbow
The hidden beauty of the rainbow
The hidden beauty of the rainbow
 
sin !1 n2
sin !1 n2
       =            =
sin ! 2 n1
             sin ! 2 n1
The hidden beauty of the rainbow
!1

     !2
                !2
                 !2
                      !

           !2             sin !1 n2
                                 =
                          sin ! 2 n1
          !1          ! = 4 ! "1 " 2 ! " 2
n2
   = 1.331 ! max = 42°
n1

n2
   = 1.343 ! max = 40°
n1                        sin !1 n2
                                 !=
                                  MAX
                          sin ! 2 n1

                         ! = 4 ! "1 " 2 ! " 2
The hidden beauty of the rainbow
WHITE LIGHT
The hidden beauty of the rainbow
Radius?      	
  20°,	
  30°,	
  42°,	
  50°	
  
                          	
  
Color sequence?	
  redàblue	
  or	
  blueàred	
  
                          	
  
 Inside the bow is brighter or darker?	
  
                          	
  
 How many bows can you see? 1,	
  2	
  ,3…	
  
                          	
  
 Is the bow light polarized?_________	
  
The hidden beauty of the rainbow
nB ea uty
Hidde
        led ge
   Know

       C urio sity
alive
                                                                       ing- come-
                                                                -teach
                                                      -to- make
                                           80   2-how
                            .edu/video
                                       s/15
                                            Levin
        h ttp://
                 tech tv.mit
                                     Walter
Next Tuesday Open Space!
credits
 Video:
 http://techtv.mit.edu/videos/15802-how-to-make-teaching-come-alive

 Creative commons pictures – by-sa:
 http://www.flickr.com/photos/osde-info/6186614300/
 http://www.flickr.com/photos/giovanniiaboni/2729591356/
 http://www.flickr.com/photos/sweetone/2624102200/
 http://www.flickr.com/photos/30218070@N08/5765568457
 http://www.flickr.com/photos/antongl/5951514342/
 http://www.flickr.com/photos/physicsdemos/5734080168/
                                                                           Thank you!
 http://www.nationalgallery.org.uk/paintings/john-constable-salisbury-cathedral-from-the-
 meadows




h3p://crea9vecommons.org/licenses/by-­‐sa/3.0/	
  

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The hidden beauty of the rainbow

  • 3. Radius?        20°,  30°,  42°,  50°     Color sequence? redàblue  or  blueàred     Inside the bow is brighter or darker?   How many bows can you see? 1,  2  ,3…     Is the bow light polarized?_________  
  • 4. Radius?        20°,  30°,  42°,  50°     Color sequence? redàblue  or  blueàred     Inside the bow is brighter or darker?   How many bows can you see? 1,  2  ,3…     Is the bow light polarized?_________  
  • 9.  
  • 10. sin !1 n2 sin !1 n2 = = sin ! 2 n1 sin ! 2 n1
  • 12. !1 !2 !2 !2 ! !2 sin !1 n2 = sin ! 2 n1 !1 ! = 4 ! "1 " 2 ! " 2
  • 13. n2 = 1.331 ! max = 42° n1 n2 = 1.343 ! max = 40° n1 sin !1 n2 != MAX sin ! 2 n1 ! = 4 ! "1 " 2 ! " 2
  • 17. Radius?  20°,  30°,  42°,  50°     Color sequence?  redàblue  or  blueàred     Inside the bow is brighter or darker?     How many bows can you see? 1,  2  ,3…     Is the bow light polarized?_________  
  • 19. nB ea uty Hidde led ge Know C urio sity
  • 20. alive ing- come- -teach -to- make 80 2-how .edu/video s/15 Levin h ttp:// tech tv.mit Walter Next Tuesday Open Space!
  • 21. credits Video: http://techtv.mit.edu/videos/15802-how-to-make-teaching-come-alive Creative commons pictures – by-sa: http://www.flickr.com/photos/osde-info/6186614300/ http://www.flickr.com/photos/giovanniiaboni/2729591356/ http://www.flickr.com/photos/sweetone/2624102200/ http://www.flickr.com/photos/30218070@N08/5765568457 http://www.flickr.com/photos/antongl/5951514342/ http://www.flickr.com/photos/physicsdemos/5734080168/ Thank you! http://www.nationalgallery.org.uk/paintings/john-constable-salisbury-cathedral-from-the- meadows h3p://crea9vecommons.org/licenses/by-­‐sa/3.0/