What is the difference in refraction through a prism and refraction through a glass slab?

Asked by Topperlearning User | 10th Jun, 2014, 02:00: PM

Expert Answer:

When a ray of light suffers refraction through a Glass slab  it neither converges or diverges but gets displaced parallel to itself.After refraction at two parallel faces of a glass slab, the ray of light emerges in a direction parallel to the incident ray on the slab.Hence no dispersion occur, but only lateral displacement.  whereas in a prism a ray of light suffers two refractions on passing through a prism and hence deviates through a certain angle from its original path.

Answered by  | 10th Jun, 2014, 04:00: PM