A cubical block of glass of refractive index n1=32 is in contact with the surface of water of refractive index n2=43. A beam of light is incident on the vertical face of the block. After refraction, a total internal reflection occurs at the base and refraction at the opposite face takes place. The ray emerges at angle θ as shown. The value of θ is given by

A cubical block of glass of refractive index n1=32 is in contact with

1.	A cubical block of glass of refractive index n1=32 is in contact with the surface of water of refractive index n2=43. A beam of light is incident on the vertical face of the block. After refraction, a total internal reflection occurs at the base and refraction at the opposite face takes place. The ray emerges at angle θ as shown. The value of θ is given by
Answer» A cubical block of glass of refractive index $n_{1} = \frac{3}{2}$ is in contact with the surface of water of refractive index $n_{2} = \frac{4}{3}$ . A beam of light is incident on the vertical face of the block. After refraction, a total internal reflection occurs at the base and refraction at the opposite face takes place. The ray emerges at angle $θ$ as shown. The value of $θ$ is given by