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When light passes through a rectangular glass slab, the emergent ray is:
AParallel to the incident ray but laterally shifted (no angular deviation)
BPerpendicular to the incident ray
CDeviated by 90°
DBent at the same angle as the incident ray
Answer & Solution
Correct answer: A. Parallel to the incident ray but laterally shifted (no angular deviation)
For a **rectangular slab** with parallel sides: refraction at the two interfaces (air-glass, glass-air) gives **emergent ray parallel to the incident ray** — no angular deviation, only **lateral shift** equal to t·sin(i − r)/cos(r).
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