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Monochromatic light of wave length traveling in a medium of reflective index n subscript 1 euters a denser medium of refractive index  n subscript 2. What is the wave length in the second medium?

  1. lambda subscript 1 open parentheses straight n subscript 2 over straight n subscript 1 close parentheses
  2. fraction numerator lambda subscript 1 open parentheses n subscript 1 minus n subscript 1 close parentheses over denominator n subscript 1 end fraction
  3. fraction numerator lambda subscript 1 open parentheses n subscript 2 minus n subscript 1 close parentheses over denominator n subscript 2 end fraction
  4. lambda subscript 1 open parentheses n subscript 1 over n subscript 2 close parentheses

The correct answer is: lambda subscript 1 open parentheses n subscript 1 over n subscript 2 close parentheses

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