16. In an experiment to trace the path 1 point of a ray of light passing through a rectangular glass slab, four students tabulated their observations as given below. Student A B с D Zi 30- 30° 30 30° Z1 18 20° 192 21.5° Ze 329 32.5° 30 290
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We know that angle of incidence is equal to angle of emergence.
And for a light ray going from rarer to denser medium we also know that angle of incidence is greater than angle of refraction
Thus it implies that angle of emergence is greater than angle of refraction.
B. angle of emergence is equal to angle of incidence
C. Since angle of emergence is equal to angle of incidence, thus emergent ray is parallel to incident ray.
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