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What makes a Rainbow?, A ...,.....---------.....---", ,/" .•...,-,' .....4:.; '\•.. :
~B,.,
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• Blue is refracted more than red(dispersion) at A
• Total internal reflection occursat B
• Blue is refracted more than redat C
--~~ \
Observer sees red from higher'aindrops and blue from lower ralndroos,
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DOUBLE RAINBOWSoccur becauseof an additionaltotal internalreflection !!!
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177. Figure 33.25 A polarizer and an analyzer
</) i-, the unglc between the poluriz in];i.1XC'-; or the polarizer and an~lI)vcr..
Polarizer L :,....- ----.,,- .•....
/"/ IIncident / ...r:~I~unpolarizedv 1_liuht ! 1"1b I ;;!
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178. Figure 33~27Polarization of light incident on a reflecting surface
G) If unpolanzcd light is incidentat ihc polarizing angle .. ,
A~ik:tY/ilffJ'IlflYlccs,
Normal®.,.,then the reflectlight i-, /()()9~ polarizperpendicular tn theplath' of incidcllu: ...@Altcl'nati\,cly. if
uupolarivcd lighl i:-- rncidcnt011the rcflcet ing s'lirt an" ,II
,II) {lngle other than 0p' Ihi.'
reflected light i~parnatt»polarized.
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® ".and the transmitted light!:-'l'ftrtiall" po1:lIi/l.;d paralh.:1to the plane or incidence.
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179. Figure 33.28 The significance of the 2,2.I.arizi.Q.g~
ote: This is a sid vi of the situ tion. ho 'n in Fie. 3_1.27.Component perpendicularto plane of page
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ra -s are p rp n licular t each other and
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