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GK QUESTION#3084

Statement I: The concept of refractive index explains how light bends when passing through different substances. Statement II: Willebrord Snellius was the first to formally state the law of refraction involving a constant ratio for each substance.

  1. ABoth Statement I and Statement II are true, and Statement II is the correct explanation of Statement I
  2. BBoth Statement I and Statement II are true, but Statement II is not the correct explanation of Statement I
  3. CStatement I is true, but Statement II is falseCorrect answer
  4. DStatement I is false, but Statement II is true
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Answer

C. Statement I is true, but Statement II is false

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Explanation

Refractive index is used in the law governing refraction. Snellius is associated with the familiar sine law, but the claim that he was the first to formulate it is too strong: historical research identifies an earlier equivalent relation in Ibn Sahl’s tenth-century work. Statement I is true and Statement II, with its priority claim, is false.

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