Question

What would be the path of refracting ray and emergent ray,if two glass slab kept attached to each other

Answer 1

they would be parallel to each other
which means incident ray is parallel to the refracted ray
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Answer 2

when light ray enters in glass first slab it gets bent to refraction of light .Reflected ray also try to come out from the slab so it fall on another side of slab and refracted then emergent ray is come out in manner with parallel to incident ray...