K.C.S.E Physics Q & A - MODEL 2017PP2QN15
​(a) Figure 5 shows the interface between glass and air.
​Draw on the figure a ray diagram to illustrate the critical angle.
(b) Figure 6 shows a ray of light incident at right angles to face AB of a right angled glass prism of refractive index 1.62.
​(i) Determine the critical angle of the material.
(ii) Complete the ray diagram to show the path of light until it leaves the prism. (c)State any two applications of prisms.
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