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InterviewSolution
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A prism is made of glass of refractive index 1.5. If the angle of minimum deviation is equal to the refracting angle of the prism, calculate the angle of the prism. |
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Answer» Given, `mu=1.5 ` and `A=delta_(m i n)` At minimum deviation, `r=A//2` and `delta_(min)=2i-A` Substituting for A, we get `i=delta_(min)` But `mu=(sin((delta_(m)+A)/(2)))/(sin((A)/(2)))=(sinA)/(sin[(A)/(2)])=2cos[(A)/(2)]` Therefor, `1.5=2cos[(A)/(2)]` or `A =cos^(-1)((3)/(4))` |
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