a ray of light is refracted through a rectangular glass slab.what is known as the perpendicular distasnce between the incident and the emergent ray
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When a ray of light is refracted through a rectangular glass slab, the ppd between the incident ray and the emergent ray us called lateral displacement. ....
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The perpendicular distance between the original path of incident ray and the emergent ray coming out of the glass slab is called lateral displacement of the emergent ray of light and the angle which the emergent ray makes with the normal is called the angle of emergence.
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