tances of its surfaces from 0 and P respectively,ii, t, the angles of incidence on the plate,r,, r, the corresponding angles of refraction,fh, /i, the refractive indices: then a=i(^-|.^)(8eci,-8ect,)-f-T(yLt2secra-/Aisecr,) (3), with the condition 0 = (^-|.^)(tani,-tani,)H-T(tanr2-tanri) (4);… … Letwhere Fig. 48..2 - / + e, n = i^i - T/i, /a = i^ + ^2, Il = / — e, ?- sin I = /jLi sin R^ — ^ sin iia, 6. I?!, ya being small quantities, since the doubly refracting energy is in mostcases weak; then /i, - sm ii sm racosrj . sin /cos iJs + ecos /sinRi — Visi° ^sin E^ cos R^ sin jRa cos i^ s= sin…
Optics
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