1. RAIN BOW

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?_________

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

15. WHITE LIGHT

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/