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Numericais in rnysics
20. The angle of a thin prism is 5º. What will be its refractive index if the
deviation of a ray is 2.5° ?
ans. 1.5.
We have 8 = A(u - 1)
2. u = 8/A + 1 = 2.5/5 + 1 = 1.5
27. Calculate the deviation if the prism in the above question is dipped in
water; (R. I. for water = 4/3).
Ans. 0-625°
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