(i) There is no lateral shift for zero degree incidence
(ii) The lateral shift approaches the plate thickness t for angle of incidence of 90 degrees.
For details about case ii, see
http://catarina.udlap.mx/u_dl_a/tales/documentos/lfa/dominguez_r_mz/capitulo3.pdf
for what angle of incidence the lateral shift produced by parallel sided glass plate is (i) zero (ii) maximum
3 answers
90
When the lateral shift is minimum and maximum