Define refractive index of a transparent medium, a ray of light passes through a triangular prism. Plot a graph showing the variation of the angle of deviation with the angle of incidence.

Q. The graph shows the variation of angle of deviation with the angle of incidence for a triangular prism. The refractive index of the prism is

Q. A ray PQ is incident normally on the face AB of a triangular prism of refracting angle of ${60}^o$, made of a transparent material of refractive index $\frac{2}{\sqrt{3}}$ as shown in the figure. Trace the path of the ray as it passes through the prism. Calculate the angle of emergence and angle of deviation.

Q. A ray of light suffers minimum deviation, while passing through a prism of refractive index 1.5 and refracting angle 60${}^o$. Calculate the angle of deviation and angle of incidence.

Q. Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence, define the angle of deviation.

Q. A ray is incident at a small angle of incidence $i$ on one face of a prism with angle of prism $6^{\circ }$ and emerges from the second face. If the prism is dipped in transparent liquid of refractive index $1.2$ and angle of deviation is $2^{\circ }$, then what is the refractive index of prism material?