Physics-
General
Easy

Question

The respective angles of the flint and crown glass prisms are A to the power of apostrophe and A. They are to be used for dispersion without deviation, then the ratio of their angles A apostrophe divided by A will be

  1. negative fraction numerator left parenthesis mu subscript y end subscript minus 1 right parenthesis over denominator left parenthesis mu subscript y end subscript ' minus 1 right parenthesis end fraction-1)'/>    
  2. fraction numerator left parenthesis mu subscript y end subscript ' minus 1 right parenthesis over denominator left parenthesis mu subscript y end subscript minus 1 right parenthesis end fraction-1)(μy-1)'/>    
  3. left parenthesis mu subscript y end subscript ' minus 1 right parenthesis-1)'/>    
  4. left parenthesis mu subscript y end subscript minus 1 right parenthesis    

The correct answer is: negative fraction numerator left parenthesis mu subscript y end subscript minus 1 right parenthesis over denominator left parenthesis mu subscript y end subscript ´ minus 1 right parenthesis end fraction


    Since A left parenthesis mu subscript y end subscript minus 1 right parenthesis plus A to the power of ´ end exponent left parenthesis mu subscript y ´ end subscript minus 1 right parenthesis equals 0 rightwards double arrow fraction numerator A to the power of ´ end exponent over denominator A end fraction equals negative open parentheses fraction numerator mu subscript y end subscript minus 1 over denominator mu subscript y ´ end subscript minus 1 end fraction close parentheses

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