Question

To trace the path of ray of light through a triangular glass prism a student observes that the emergent ray :
1. has bent away from the base of the prism
2. has bent towards the base of the prism
3. moves parallel to the direction of incident ray
4. is not obtained

Answer 1

has bent towards the prism

Answer 2

Procedures-

1) Fix a sheet of a white paper on drawing board using drawing pins

2) Place a glass prism on it in such a way that it rests on its triangular base . Trace the outline of prism using pencil

3) Draw a straight line PE inclined to AB and fix two pins at point P and W on PE

4) Look for the images of pins and fix pins R and S on the straight line made from the images of P And Q

5) Remove the pins and prism

6) Line PE meets boundary of prism at point E and similarly join and produce R and S such that these lines meet the boundary of E and F .
join E and F

7)draw perpendiculars to the refracting surface AB and AC of the prism at points E and F respectively
8) Mark an angle of incidence <i, angle of emergence


thus the emergent ray bend away from normal or base of prism as show in figure

hope helped.