why a ray of light doesn't deviate as a result of refraction through a glass slab?
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Light falling perpendicularly on glass slab
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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kyu ki glass bulb ki apni kuch limitations hoti hai how can it change
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