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Physics

A ray of light travels from a medium of refractive index n1 to a medium of refractive index n2. If angle of incidence is i and angle of refraction is r, then sin isin r\dfrac{\text{sin i}}{\text{sin r}} is equal to

  1. n1

  2. n2

  3. n2n1\dfrac{\text{n}2}{\text{n}1}

  4. n1n2\dfrac{\text{n}1}{\text{n}2}

Refraction Plane Surfaces

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Answer

n2n1\dfrac{\text{n}2}{\text{n}1}

Reason — According to Snell's law,

sin isin r\dfrac{\text{sin i}}{\text{sin r}} = n2n1\dfrac{\text{n}2}{\text{n}1}

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