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What is optically denser and optically rarer medium ? |
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Answer» Solution :If `n_(21) gt 1` i.e, REFRACTIVE index of medium-2 is greater than of medium-1, then medium-2 is said to be denser than medium-1. Snell.s LAW `(SIN i)/(sinr)=n_(21)`  `therefore(sini)/(sin r) gt 1` `therefore` sin I `gt` sin r `therefore` i `gt` r Hence, REFRACTED ray bends toward normal. Here, medium-2 is said to be denser as compared to medium-1. If `n_(21) lt` 1, i.e. refractive index of medium-2 is less than medium-1, then medium-2 is said to be RARER than that of medium-1. `(sin" "i)/(sin" "r)=n_(21)` (Snell.s law) `therefore` sin i `lt` sin r `therefore` i `lt` r  Hence, refracted rays goes away from normal. Here, medium-2 is said to be rarer as compared to medium-1. |
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