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Class 10 Science Medium Mcq English Medium

For a rectangular glass slab, how does the emergent ray's direction compare to the direction of the original incident ray?

Question
For a rectangular glass slab, how does the emergent ray's direction compare to the direction of the original incident ray?
The emergent ray is always perpendicular to the incident ray
The emergent ray is parallel to the incident ray, though laterally shifted
The emergent ray travels back in the exact opposite direction
There is no consistent relationship at all
Answer
The emergent ray is parallel to the incident ray, though laterally shifted
Detailed Explanation
The chapter explains that the emergent ray from a rectangular slab is parallel to the incident ray's direction, because the bending at the two parallel surfaces is equal and opposite, though the ray is shifted sideward.
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