Question:
“A ray of light incident on a rectangular glass slab immersed in any medium emerges parallel to itself.” Draw a labelled ray diagram to justify this statement.
“A ray of light incident on a rectangular glass slab immersed in any medium emerges parallel to itself.” Draw a labelled ray diagram to justify this statement.
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Emergent ray is parallel but shifted due to lateral displacement.
Updated On: Jan 13, 2026
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Solution and Explanation
When a light ray enters a rectangular glass slab, it bends towards the normal when entering the denser medium (glass) and away from the normal when leaving it. The emergent ray is parallel to the incident ray but displaced sideways.
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