Final answer:
The student's measurements of the angle of incidence, angle of refraction, and angle of emergence through a glass slab would demonstrate that the angle of incidence and angle of emergence are equal and greater than the angle of refraction.
Step-by-step explanation:
When a ray of light passes through a glass slab, it undergoes refraction, which is the bending of light as it moves from one medium to another. According to Snell's Law, the angle of incidence (∠i) will always be equal to the angle of emergence (∠e) due to the light entering and exiting at the same angle into mediums of the same refractive index, such as air to glass and then back to air.
However, the angle of refraction (∠r) within the glass slab is different because it depends on the difference in the refractive index between air and glass. Since the refractive index of glass is typically higher than that of air, the angle of refraction will be lesser than the angle of incidence, following the principle that when light moves from a medium with a lower refractive index to a medium with a higher refractive index, it bends towards the normal (imaginary perpendicular line at the point of incidence). Therefore, the student will conclude that ∠i = ∠e > ∠r, which corresponds to option (B).