• question_answer In your laboratory you trace the path of light rays through a glass slab for different values of angle of incidence $\mathbf{(}\angle \mathbf{i)}$ and in each case measure the values of the corresponding angle of refraction $\mathbf{(}\angle r\mathbf{)}$ and angle of emergence$\mathbf{(}\angle e\mathbf{)}$.             On the basis of your observations your correct conclusion is: (a) $\angle i$ is more than $\angle r,$ but nearly equal to $\angle e$ (b) $\angle i$ is less than $\angle r,$ but nearly equal to $\angle e$ (c) $\angle i$ is more than $\angle e,$ but nearly equal to $\angle r$ (d) $\angle i$ is less than $\angle e,$ but nearly equal to $\angle r$

(a) $\angle i$ is more than $\angle r,$ but nearly equal to $\angle e$