why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself ? explain using a diagram
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146
Answer:
the light ray gets refracted by the glass slab. after the refraction it comes out from the glass. since it is rectangular and both sides have the same medium.the light emerges in such a way that the incident and the emergent rays are parallel
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Answer:
In a glass slab the opposite faces are parallel.so,the angle of refraction by first interface becomes angle of incidence at the second interface i.e:∠r 1 =∠r 2
By the principle of reversibility,the emergent ray bends such that ∠i=∠e
Thus, the emergent ray and incidence ray becomes parallel.
Explanation:
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