Question

student is doing experiment to draw the path of light rays passing through a glass slab for this he measure the angle of refraction and angle of emergence for every angle of incidence in all the cases he found that

Answer 1

angle of incidence = angle of emergence

Answer 2

Light refraction is the change of direction when it passing through one medium to another. When the student doing the experiment and draw the path of light rays passing through a glass slab and measured the angle of refraction and the angle of emergence for each angle of incidence ,then he found that the incidence angle was equal to the emergence angle in all cases.