Brewster's law: polarising angle, refractive index, speed or wavelength in the medium

1. A.
   $\sin^{-1}\frac{1}{\sqrt{6}}$
2. B.
   $\sin^{-1}\frac{1}{\sqrt{3}}$
3. C.
   $\sin^{-1}\frac{\sqrt{3}}{2}$
4. D.
   $\cos^{-1}\frac{\sqrt{3}}{2}$

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1. A.
   $V = Ccos\left( i_{p} \right)$
2. B.
   $\ Vcos\left( i_{p} \right) = Csin\left( i_{p} \right)$
3. C.
   $C = Vcot\left( i_{p} \right)$
4. D.
   $Vsin\left( i_{p} \right) = Ccos\left( i_{p} \right)$

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1. A.
   $\ \theta = \sin^{- 1}\left( \frac{v}{c} \right)$
2. B.
   $\ \theta = \tan^{- 1}\left( \frac{v}{c} \right)$
3. C.
   $\ \theta = \cot^{- 1}\left( \frac{v}{c} \right)$
4. D.
   $\ \theta = \cos^{- 1}\left( \frac{v}{c} \right)$

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1. A.
   $90^\circ - \sin^{-1}(\sin\Phi/\mu)$
2. B.
   $90^\circ$
3. C.
   $\sin^{-1}(\mu\cos\Phi)$
4. D.
   $90^\circ + \Phi$

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1. A.
   $\lambda_a = \lambda_g\cot\theta$
2. B.
   $\lambda_g = \lambda_a\cot\theta$
3. C.
   $\lambda_a = \lambda_g\tan^2\theta$
4. D.
   $\lambda_g = \lambda_a\tan^2\theta$

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