Physics-
General
Easy

Question

In the following diagram if V2 > V1 then

  1. lambda subscript 1 end subscript equals square root of lambda subscript 2 end subscript end root    
  2. lambda subscript 1 end subscript less than lambda subscript 2 end subscript    
  3. lambda subscript 1 end subscript equals lambda subscript 2 end subscript    
  4. lambda subscript 1 end subscript greater than lambda subscript 2 end subscript    

The correct answer is: lambda subscript 1 end subscript greater than lambda subscript 2 end subscript


    because V subscript 0 end subscript equals open parentheses fraction numerator h over denominator e end fraction close parentheses nu minus open parentheses fraction numerator W subscript 0 end subscript over denominator e end fraction close parentheses. From the graph V subscript 2 end subscript greater than V subscript 1 end subscript
    Þ fraction numerator h nu subscript 2 end subscript over denominator e end fraction minus fraction numerator W subscript 0 end subscript over denominator e end fraction greater than fraction numerator h nu subscript 1 end subscript over denominator e end fraction minus fraction numerator W subscript 0 end subscript over denominator e end fraction Þ nu subscript 2 end subscript greater than nu subscript 1 end subscript
    Þ lambda subscript 1 end subscript greater than lambda subscript 2 end subscript (as lambda proportional to fraction numerator 1 over denominator nu end fraction)

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