K.C.S.E Physics Q & A - MODEL 2008PP2QN16

K.C.S.E Physics Q & A - MODEL 2008PP2QN16

​(a) State two conditions necessary for total internal reflection to occur 
(b) Figure 9 shows a ray of light incident on the boundary between two media 1 and at an angle

​Show that the refractive index for a ray of light traveling from medium 1 to medium 2 is given by:
M2 = 1/Sin θ
(c) Figure 10 shows a ray of light incident on one face of a block of ice of refractive index 1. 31 and totally reflected at the adjacent face

​Determine
(i) Angle Φ 
(ii) Angle x 
(iii) Angle θ, the greatest angle for which the total internal reflection is possible 

answers