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  • The following figure represents a wavefront AB which passes from air to another transparent medium and produces a new wavefront CD after refraction. The refractive index of the medium is (PQ is the

The following figure represents a wavefront AB which passes from air to another transparent medium and produces a new wavefront CD after refraction. The refractive index of the medium is (PQ is the boundary between air and the medium).       

Option: 1

\frac{\cos \theta _{1}}{\cos \theta _{4}}

 

 

 


Option: 2

\frac{\cos \theta _{4}}{\cos \theta _{1}}


Option: 3

\frac{\sin \theta _{1}}{\sin \theta _{4}}


Option: 4

\frac{\sin \theta _{2}}{\sin \theta _{3}}


Answers (1)

By Snell's law:

 

 

\frac{\sin i}{\sin r}= \frac{\mu _{2}}{\mu _{1}}

For \, \, i =,\theta _{1},r=\theta _{4}\, and\, =\mu _{1}=1\, \, .\mu _{2}= \frac{\sin \theta _{1}}{\sin \theta _{4}}

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Kshitij

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