Question

Place rectangular glass block and trace,draw normal between side A and B,place pins at P and Q,trace the path of fire rays through glass block for angles =60°,50°,40°,30°,20°.for each ray measure and record the angle of incidence and the corresponding lateral displacement.

Answer 1

As per the question,

angle of incidence $(i)=60°,50°,40°,30°,20°.$

As we know that, that angle of incidence(i) = angle of emergent (e)