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A glass prism of refracting angle A =60^ gives minimum angle of deviation =30^ with the maximum error of 1^ when a beam of parallel light passed through the prism from air during an experiment. Find the permissible error in percent in the measurement of refractive index of the material of the prism

Options

  1. A5 / 18
  2. B5 / 3
  3. C2 / 3
  4. D4 / 7

Correct answer

A. 5 / 18

Step-by-step solution

aligned & = ( A+ m 2 ) (A / 2) & = 2 & d = ( A+ m 2 ) (30^ ) m 2 & d = 1 2 180 & d = 5 18 % aligned

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