In an experiment on tracing the path of a ray of light through a rectangular glass slab, four students A, B, C and D used the following values of angle of incidence and the distance between the feet of the two pins (fixed on the incident ray):
A. (30°, 45°, 60°) and 1 cm
B. (30°, 45°, 60°) and 6 cm
C. (20°, 50°, 80°) and 10 cm
D. (20°, 50°, 80°) and 15 cm
Whose choice is the best choice and why?
The best choice is option B because the value of angles should the ones which are very common to us and should come handy while calculating the value of refractive index of the slab. Also the value of the distance between the pins should be adequately large so as to avoid error in the calculations.
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