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Two monochromatic rays of light are incident normally on the face AB of an isosceles right-angled prism ABC. The refractive indices of the glass prism for the two rays "1" and "2" are respectively 1.35 and 1.45. Trace the path of these rays after entering through the prism. |
Answer» Solution : As per question the REFRACTIVE index of GLASS prism for RAY no. 1 is 1.35, Hence, its critical angle `i_(1) =sin^(-1)(1/1.35) = 47.8^(@)` For ray no. 2 the refractive index of glass prism is 1.45. Hence, its critical angle `i_(2) = sin^(-1) (1/1.45) = 43.6^(@)`. FIG. 9.47 ray no. 1 is refracted from surface AC but ray no. 2 undergoestotal internal REFLECTION at surface AC and comes out from the surface BC. |
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