Question

10(b)(iii) Sketch a graph to illustrate the variation of the angle of deviation, d, with that of incidence, i, for a ray of light travelling from air into a triangular glass prism. Indicate on the graph the point at which the angle of incidence i is equal to the angle of emergence e.

Accepted Answer

The graph of deviation d against angle of incidence i is a curve which decreases to a minimum value (d_min) and then increases again. At d_min, the angle of incidence i equals the angle of emergence e (i=e), as marked on the graph.

WAEC Physics 2017 Theory — Question 22

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