"During refraction of light through the glass slab, incident ray and emergent ray are parallel to each other." Explain.
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Explanation:
When the incident ray falls at the glass slab, it gets refracted as the medium gets changed from air to glass and at the emergence point, the medium again gets changed from glass to air leading the emergent ray to reflect. It explains the phenomena of incident ray being parallel with emergent ray during the refraction of light through glass slab.
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