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__[Then. ind [ray a] =O, Explanation a a Bg Exterior angle — § Co OTP) + +++ eee Li : To = § = (i=1,) 4 (eta). ne AS YP pier. era ~8,,.5% \ 2 ~~ On__quadrilateral APS & | zp+ 25 = 1280 —-@ 3 _| Also, | _—¥ + V4 15 = 190° —@ (angles. ay hiangle PSB) From _@_ovd_ © ‘ ¥, +715, = A ——@) 40,1 f= it+te-A Gi : $2 angle 4, daviakian. =_li+e = axel =i |Co ndiien Gi davialion: tothe: minimum (S—> Sir Oise I@ Y= 7, c Refracted vay become parallel to He} loase__y prism) |_Applyima —Snels law oA interface AB- Sni_ — NM _ M Sin T _ Since, {+e = AtS _ - 2) = A+Sm fa(Bmsise} — : t = AX Sm 2 @ Y= = ¥_(Say) | _|A\so_,— : — +7, =A > ay-A > T= A ===) | Substituting @—and _@ _—in_O Z T we Sm (At8=) zs —_ 7 : ee sin_(B)- | | Scanned with CamScanner —(MVasiation Os Angle. Deviation (S) with angle cf —|ITncidence a id + - — “ : - Paina iple 04 Reversib, = litg 9 light. __| els t | For tuo dierent angle inilaners, angle «2 deviation | ‘ As _same-_Cone_argle A Te | —-Sp—imergence_(e}.— d a 7 L 21 jao _REERACTION THrovugu Smartt Anere Prism i> (Ass? are?) (A b= > t= MY, —----W 7 —|ApplyingSnell"* - “Losa_at._intentace Ac. Al_anglea ave. : - Smoal\_*. sing = 0 | Sin — 1 =, Te 2 I sine wre aT = =>. @= UY ----@ = It _| Since ite = A+S ae _ | al | >, WY, = A+ 8 rt = AtsS | | DS MA=-A=s5 o . = > [= A Cu-1) For small __avgle prism: | _| Deviation —2, Night _als p_dapendo_om § oA | . ~ B o% (=! [Polen oy get (A) = Rt Been oD | Ag > Ay 3 — Mest, elie)? Se < oe) Chis. io Course, dispersion 04 tohite Might YZ Scanned with CamScanner arln}2o- _|_ Numerical (PRISM) en j@_A Oy Ff Night As incident ot an angle a 60° on _| _one_4ace _d,_& prism, having- angle 4, incidence Zo |The. ray _emerg} out of, dhe prism mates an -angle_ +15, Bo! cwith the incident voy + Show that the. emergent | [ray Xn__perpendicular tothe _4ace _+througl —calnich it = emerges and ___ Calculate the refractive index of, the _| material —d, Ahe__prism - Ang: HM = VB RD Monochromatic light (single ccave length light) fallz_on & right —angled prs sm at _on_angle__o, incidence 45°. _ Tae emergent light 4a _-found to MS _| graze clang the 4ace AC. Find the ——Fae PI : |vetractve index oh the material _d\ prism. air 7M We Noir 6 * Ans: yal ee oe : es (3) Atay 9 | ight __passing——_through a_prisma having AA =V21 Suthers mini mum__deviotion. 9k _4o__found_that_ the _omgle.—_| | Ay incidence.—io double the angle _d}, vefraction _coithin the prise. whet _da_the angle a the px sm2_Ansi A= 90. GDA ray _o, light _t»_incident_on_one_face_ah_an_ 2quilateval prism, Ushen the angle. dy incidence. _An_ 90°, the refracted, ya: fora the _fivet__face __gpes__undeviated fromthe sec ond 2. Budl _ | the refractive index _d, the material the__prism- : 7 Ans: U= 2/3 G5) One face 4, apa sm_caith_refracting _angle_3e_CA=3 o) Lond _M= V2 in_silvered.. the incident ray vetacea ite i nitial_| _| pata, toot isthe. -ongle_dj,_incidence ? 7 N y _ . Ans: _i = 45°. _ DA glass prism 4, = Bis immersed — in_asoter_(_L py) A light beam i neident ag, SHEE snormally on the face _AB_/n_otelly reflected, te veach the face Bc, _(ac_shocon. im igure) Of, 1 4o_exiticall ang! - a & U 2 Se Io (a)_sinie= B (b) smig= 3 a 4 (e- _Sinie= = (4) mis 3. @- An = AAO) _fexi.sina__tor. : _|Red , Grean and _ Red S _|Blue— color Seeen > . ———<§—_>—_ 1] | light ave 1:39, 1-44 and_1:44. : — br Complete Tox diagram. Qin) BA a 
