K.C.S.E Physics Q & A - MODEL 2017PP2QN15

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. 

answers

​(c)- Dispersion of white light
- In periscopes
- In Binoculars
- In telescopes