Critical angle of prism is 40^@. Its prism angle should be ...... to get raywith minimum deviation.

Critical angle of prism is 40^@. Its prism angle should be ...... to g

1.	Critical angle of prism is 40^@. Its prism angle should be ...... to get raywith minimum deviation.
Answer» `40^@` `60^@` `80^@` `90^@` SOLUTION :For minimum DEVIATION `r_1 = r_2 = R` and for prism A = `r_1 + r_2` ``A=2r Here `r = 40^@` given as critical ANGLE. `therefore` Prism angle `A=2xx40=80^@`

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Critical angle of prism is 40^@. Its prism angle should be ...... to get raywith minimum deviation.

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