in case of refraction through a glass slab- a incident ray is parallel to refracted ray b incident ray is parallel to. emergent ray c angle of incidence= angle of. refraction d none of these
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Since ray goes from glass medium to air it again gets refracted and bends away from normal. The angle “r” and r' are equal as they are adjacent interior angles to two parallel lines or normal. ... Hence, the incident ray and the emergent ray are parallel to each other.
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