Question

A student has to perform an experiment on tracing the path of a ray of light passing through a rectangular glass slab for three different angles of incidence . Four of his friends suggest the following options to him :
A) Draw the incident rays corresponding to 20o , 50o , 70oas the angles of incidence and fix the two pins on the incident rays nearly 2 cm apart .
B) Draw the incident rays corresponding to 20o , 50o , 70oas the angles of incidence and fix the two pins on the incident rays nearly 8 cm apart .
C) Draw the incident rays corresponding to 30o , 45o , 60o as the angles of incidence and fix the two pins on the incident rays nearly 2 cm apart .
D) Draw the incident rays corresponding to 30o , 45o , 60o as the angles of incidence and fix the two pins on the
incident rays nearly 8 cm apart .

Answer 1

option C) draw the incident rays corresponding to 30 45 60 as the angles of incidence and fix the two pins on the incident rays nearly 2cm apart

is correct