A student traces the path of a ray of light through a rectangular glass slab for the different values of angle of incidence

Light (10)

A student traces the path of a ray of light through a rectangular glass slab for the different values of angle of incidence. He observes all possible precautions at each step of the experiment. At the end of the experiment, on analysing the measurements, which of the following conclusions is he likely to draw ?

 

Answer

D

Exam Year: 2015