Question

How does the angle of deviation produced by a prism change with increase in
the angle of incidence.
(i) Draw a curve showing the variation in the angle of deviation with the
angle of incidence at a prism surface.
(ii) Using the curve in part (i) above, how do you infer that for given
prism, the angle of minimum deviation δmin is unique for the given
light.

Answer 1

Answer:

As the angle of incidence increases, the angle of deviation decreases first and reaches to a minimum value (δm) for a certain angle of incidence. By further increasing the angle of incidence, the angle of deviation is found to increase