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What makes a Rainbow?, A ...,.....---------.....---", ,/" .•...,-,' .....4:.; '\•.. :

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• 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

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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,

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uupolarivcd lighl i:-- rncidcnt011the rcflcet ing s'lirt an" ,II

,II) {lngle other than 0p' Ihi.'

reflected light i~parnatt»polarized.

I!a

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I

t1b

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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

Normal;

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Refract d -+---~ray

Reflectedray

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Wh n light strike. . surfac at th. olarizinz an I , th r fl ct d and r fr: ct d

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ra -s are p rp n licular t each other and

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