A beam of light AO is incident on a glass slab 1 54 in a

Last updated: 6/14/2023

A beam of light AO is incident on a glass slab 1 54 in a direction as shown in figure The reflected ray OB is passed through a Nicol prism on viewing through a Nicole prism we find on rotating the prism that A 33 N 33 B 1 The intensity is reduced down to zero and remains zero 2 The intensity reduces down some what and rises again 3 There is no change in intensity 4 The intensity gradually reduces to zero and then again increases