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The angle of minimum deviation is the s...

The angle of minimum deviation is the same as the angle of a glass prism of refractive index `mu = sqrt3.` What is the angle of the prism?

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According to question , `delta_(m) =A`.
`therefore " " mu = (sin""(A + delta_(m))/(2))/(sin""(A)/(2))`
`or, " " mu = (sin""(A + A)/(sin""(A)/(2)))/(sin""(A)/(2)) = (sinA)/(sin""(A)/(2)) = (2sin""(A)/(2) cos""(A)/(2))/(sin""(A)/(2)) = 2cos""(A)/(2)`
`therefore " " mu = sqrt(3)`
`"So"," " 2 cos""(A)/(2) = sqrt(3) or, cos""(A)/(2) = (sqrt3)/(2) = cos30^(@) or, (A)/(2) = 30^(@)`
`therefore " " A = 60^(@)`
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