On the basis of their experiment, "To trace the path of a ray of light through a rectangular glass slab," students of a class arrived at which one of the following conclusions :
A
Angle of incidence is greater than the angle of emergence,
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B
Angle of emergence is smaller than the angle of refraction.
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C
Emergent ray is parallel to the refracted ray.
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D
Incident ray and emergent ray are parallel to each other.
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Solution
The correct option is B Incident ray and emergent ray are parallel to each other. The students arrived at the result that angle of incidence and angle of emergence are equal to each other i.e. incident ray and emergent ray are parallel to each other .