Question
Mon March 04, 2013 By:
Q-In an experiment on tracing the path of a ray of light through a rectangular glass slab, four 

Q-In an experiment on tracing the path of a ray of light through a rectangular glass slab, four students A, B, C, D used the following values of angle of incidence and the distance between feet of the two pins (fixed on the incident ray). A) (30o, 45o, 60o) and 1cm B) (30o, 45o, 60o) and 6cm C) (20o, 50o, 80o) and 10cm D) (20o, 50o, 80o) and 15cm Out of these the best choice is that of student, a) A b) B c) C d) D

Expert Reply
Mon March 04, 2013
B: The angle of incidence should lie between 30o and 60o. A separation of 6 cm between the pins would be sufficient to locate the direction of incident ray and reflected ray with greater accuracy.
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