Refractive index of a prism is root_2. One side of prism is polished, if ray incidences at ......, then it will return back to its original path, refraction angle is 30^@

Refractive index of a prism is root_2. One side of prism is polished,

1.	Refractive index of a prism is root_2. One side of prism is polished, if ray incidences at ......, then it will return back to its original path, refraction angle is 30^@
Answer» `0^@` `30^@` `45^@` `60^@` SOLUTION :From Snell.s law at Q, `n= ( sini)/(sinr)` `therefore sini=nsin r` `=sqrt2xxsin 30^@` `=sqrt2xx1/2=(1)/(SQRT2)` `therefore i=45^@`

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Refractive index of a prism is root_2. One side of prism is polished, if ray incidences at ......, then it will return back to its original path, refraction angle is 30^@

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