AH Physics - Polarisation QuestionWatch
So “during the film the student looks at the screen through only one of the filters in the glasses. The student then rotates the filter through 90° and notices no change in brightness.
Explain this observation”
So obviously he shouldn’t be able to see anything at both 0 and 90° because of how polarisers work and cancelling out oscillations in all planes...
EDIT: I figured it out because there’s both a horizontal and vertical image on the screen so as he turns the lens from horizontal to vertical, the other picture begins to account for the lost brightness and eventually is the only component of the brightness...