How to do Q2?

2. A student designs a periscope using two plastic prisms, the refractive index of the plastic is 1.36. As shown in Figure 2, an object is placed in front of the periscope. T 450 object (a) Complete the path of the light ray from the object in Figure 2, and explain why the periscope fails to work. Figure 2 observer 450 (b) What can be used to replace the two plastic prisms so that the periscope can work properly