what happen when a ray of light is incident normally in the glass slab
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0
Answer:
The light ray passes undeviated.
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3
Answer:
As light rays moving through the air penetrate the glass slab, they become refracted and bent toward the normal.
Explanation:
When light falls perpendicularly or normally on the surface of a glass slab, it goes straight. There is no bending of ray of light on entering the glass slab or coming out of it. In this case angle of incidence and angle of refraction is zero.
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