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A ray of light undergoes deviation of `30^@` when incident on an equilateral prism of refractive index `sqrt2.` what is the angle subtended by the ray

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A ray of light undergoes deviation of `30^@` when incident on an equilateral prism of refractive index `sqrt2.` what is the angle subtended by the ray inside the prism with the base of the prism?
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From `mu=((sinA+delta_m)/2)//sin(A//2)`
We can see that given deviation is the minimum
deviation.
image
At minimum deviation, MN is parallel to BC is `angleB=angleC.`
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